I prefer taking a nap.

2006 Examination Collection (Lens and Application)

Multiple choice question:

(Hebei, 2006) Xiaoming explored the law of convex lens imaging, kept the position of convex lens, put candles at four percentage points of AB, C and D, and adjusted the position on the light screen, as shown in Figure 2. He summed up and discussed the following sentence. That's right (1)

A. Imaging characteristics of the camera

B. a magnifying glass is composed of the imaging characteristics of candle points.

C. at some point in the slide, light the candle. The imaging characteristics of projector D light the candle.

D. Students who reach point B on candles don't like being big.

(Pudong, Shanghai), compared with its convex lens imaging experiment at point C, when the distance from the screen is 12 cm, the convex lens screen has a clear reduced image, so it can be judged that the focal length of the convex lens can be (b).

A.5cm B.10cm C.15cm D.20

(Jiangxi, 2006) The focal length of three convex lenses is 20cm. Xiaoming made some simple optical equipment. For the first time, he made a simple camera to shoot murals, and the second package included a projector and slides of the presentation. A small insect observed directly with a magnifying glass. During use, correctly connect the following correspondence (c)

(Chaoyang District, Beijing, 2006) The focal length of the convex lens is 12cm, and the object is 7 cm away from the center of the lens on the main axis. In such an object (C),

A. inversion, reducing the real image

B. Inverted and enlarged real image

C. Vertical, enlarged virtual image

D. Erection, other large-scale virtual images

A. Li Mian's myopia requires glasses and convex lenses.

Li Mian student B, suffering from myopia, needs to wear concave lenses to make glasses.

C. Li Ming suffers from hyperopia and needs to wear glasses.

D: Li Ming, people with hyperopia need to wear convex glasses made of concave lenses.

(Xiamen, 2006), the following statement is correct: (c)

Optical platform equipment orders candle screen and convex lens.

The avatar can be on the screen.

C, when the object distance and image distance increase, it becomes a real image, such as large.

D. In the previous experiment, you should adjust the height of the candle, light screen and convex lens so that their centers are in a straight line.

(Foshan in 2006) (c)

(Haizhu District, Guangzhou, 2006) The main light of candles? The axis is 40cm away from the convex lens, and the Xu Guangping of the lens on the other side is enlarged and clear. If the candle is in the original position, remove the lens direction of 40 cm, and the image will be clear-fixed (D) upright.

A. Enlarge the virtual image and reduce it

(Hebei, 2006) Xiaoming explored the imaging law of convex lens and kept the position of convex lens. He lit candles at four points, A, B, C and D, and adjusted the mask, as shown in Figure 2. After exploration, he summed up the correctness of the following parameters: (1)

A. imaging characteristics of a camera candle placed at one point

B. The magnifying glass is illuminated by imaging features. b？

C. imaging characteristics of slide projector

D. put the candle on an object, such as an image, which is from point C to point B.

(Yichang, 2006) Xu Guangping, an enlarged real image, can be formed by the inversion of a convex lens, and its imaging principle (c).

A. camera B. magnifying glass C. slide projector D. application in optical instruments under automobile rearview mirror BR/> Hengyang (2006) The eyes of ordinary people are like the lens of a camera, and the cornea is like a convex lens. When people observe objects, such as (a)

A. Inversion, reducing real-time images B. Inverted objects in retina, expanding.

C. vertically enlarge the virtual image D. vertically enlarge the real image

(Zhuzhou) TV has introduced an invisible light called infrared remote control, which you can use to control real-time images. Sometimes the remote control can't control the window on the TV, but you can also control the TV by pressing the button along the wall arranged in one direction. This is achieved by using (a)

A. reflective TV. Light b, light refraction c, light linear propagation d, speed? light

(Taiyuan, 2006) The eye is like a camera. The light emitted by an object is refracted through the lens and imaged on the retina, which is inverted. (b)

A.b. Reverse the real-time image and restore the real-time image.

C. Vertical and enlarged virtual image D. Vertical and reduced virtual image defects, such as

(Zhenjiang et al. expanded myopia and hyperopia in 2006. ) right eyeball imaging diagram is a kind of lens type that workers with visual impairment need to wear to correct their vision (a).

A. concave, convex lens B. hyperopia, hyperopia C. convex lens D. myopia, myopia, concave

(Zhenjiang, 2006) The focal length of convex lens is 10cm, and the moving distance of lighted candle changes. The image size is 50cm to 15cm, and the image distance is (b) >: 2. 1 The image becomes larger and the image distance becomes smaller. B: I like a larger image distance.

C. the image becomes smaller and the image distance becomes smaller. D. I like to get smaller and the image distance becomes larger.

The following optical instrument (Xuzhou, 2006) is not a convex lens (C).

A. Magnifier B. Glasses C. Camera D. Application of microscope

& gt the light path below Yancheng in 2006, right (1)

(Jinzhou, 2006) The following statement is correct (A)

A. the lens of the projector is equivalent to an eye or a convex lens.

C. Look at the map with a magnifying glass, and the distance mapped by the magnifying glass should be greater than.

D. Convex lens with camera focal length, in which the object is in an upright position on the retina, reducing real-time images.

(Shenyang, 2006) In a sunny classroom, Xiao Xiong holds a convex lens with a focal length of 10 cm. White wall and Windows Mobile, the window that the wall can see, just like (b).

Big B. handstand, handstand, reduction

C. stand upright, expand its verticality, and shrink

(Chengdu, 2006) 4 Imaging optical instruments, the following statement is correct (C)

A. The magnifying glass becomes an upright and magnified real image.

B. photography under construction reduces real-time images.

C. real slide projector and machine inverted amplification.

D.

Chengdu (2006) stands upright like glasses, and the focal length of the lens to enlarge the virtual image is 10cm. When Xiaogang used it to make exhibition photos of small substances, the camera was moving (A).

A. the distance between images of the same size becomes larger.

B. like it

C.i like smaller and larger images. The distance between the smaller image and the larger image is 50 cm, that is, 12cm.

& gtd. The image is the smallest and the image distance becomes smaller.

Fill in the blanks:

According to the law of Inner Mongolia, the focal length of the convex lens used in the convex lens imaging experiment is 10 cm, and the experimental convex lens is fixed. When the focal length of the mask is 1.5 times, the image on the screen. Do you think that on a straight CD, the position of the mask will move at least cm, and the image will appear on any moving candle screen?

Answer: 5

(Beijing, 2006) The propagation direction of a group of cylindrical lenses is parallel to the refraction direction of light, as shown in figure 16. From the chart, the focal length of the lens is cm; When will Zhu Yan leave the hospital? The left side of the convex lens is 12cm. Here, as shown in figure 16 B, it can be seen from the magnified virtual image (filling: "positive" or "negative") of the convex lens that the right to pass through the lens.

Answer: 15cm, upright.

Wuhu (2006) The lens of the human eye structure is equivalent to a mirror. After the lens enters the retina, the light is weakened from the object (vertical or inverted)? . The clearest and most easily fatigued distance of an eye object is called visual distance. The distance of presbyopia vision (optional "greater than", "equal to" or "less than") can be determined according to the structure of presbyopia.

Answer: convex lens, inverted, never allowed to throw transparent bottles anywhere in the forest, than

(Heilongjiang in 2006). This is because rain water enters the drink bottle corresponding to the _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

A: The convex lens focuses light.

(Qinzhou, 2006) The lens of a camera is equivalent to a lens (convex or concave); Stamps use a magnifying glass (as shown in Figure 8) to view the scaled image of the image (you can choose "real" or "virtual").

Answer: Convex deficiency

(Guilin in 2006)? At that time, Xiao Ming was doing his homework at home, dropping a drop of water on the glass counter of his desk, imagining what would happen through that drop of water. He found that the text on the animated image of the platen below was more stressful. This is because the water drop at this time is an enlarged image (optional "real" or "virtual") formed by the refraction of the water drop equivalent to the characters on a picture.

Convex lens, virtual

(Yichang, 2006) A group of lenses at the two ends of the microscope barrel, each lens acts as a lens, and the human eye magnifies the image (filling in or filling in) through microscopic objects.

A: Convex, fictional.

Huanggang (2006) Sports, researchers often use flash photography to analyze and guide athletes' movements. When exposed to the light of a light source, athletes will _ _ _ _ _

_ _ _ _ _ Form a mirror in front of the camera

_____________________

Like the rhythm of shooting, stroboscopic photography is the light source of photography. Looking at the photos in the picture, you can see the stroboscopic lights.

Photography background _ _ _ _ _ _ _

(Fill in "light" and "dark").

Answer: reflective convex lens; Invert to reduce the darkness of real-time image.

(Xiangfan, 2006) The fish raised in the round fish tank looks better than the real fish, because the round fish tank is equivalent to a mirror.

Answer: convex lens

(Changsha, 2006) The picture shows a beam of parallel light passing through a lens, and the lens shown in the picture is _ _ _ _ _ _ _ _ _. When it is used as a camera lens, the focus of the object is twice that of the outside, and it becomes inverted, such as reducing _ _ _ _ _ _ _.

Answer: convex solid

(Zhuzhou, 2006) The eyes are the windows to the soul. The graph 1 is a small bright road graph. Looking at distant objects, he _ _ _ _ _ _ _ eyes. The correction method is to wear _ _ _ _ _ _ _ _ lenses and glasses.

Answer: myopia; weaken

(Changchun, 2006) The lens of the human eye camera and the cornea together are equivalent to a _ _ _ _ _ _ _ _ _ lens, and the light emitted by the object will form _ _ _ _ _ _ _ _ _ _ _ _ on the retina (optional "upright" or "inverted"). If you don't pay attention to eye hygiene for a long time, it will lead to myopia. There is an operation to treat myopia. When the cornea is treated by laser, the light deflection ability of the lens composed of lens and cornea is _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

A: Convex (or convergent); Inverted; faint

(Golden State, 2006), a scene shot by Xiao Qiang with a camera with a certain focal length. If the camera is shooting a scene, the movie of the scene will be in a clear image of _ _ _ _ (optional "big" and "small" or "same").

Answer: small

(Yunnan, 2006) Convex lens light fusion effect. The focal length of the camera lens is 15cm, and the negative distance of the portrait lens should be 30 cm (fill in "greater than", "less than" or "equal to"); % negative also like (fill in "real" or "virtual").

A: A lot. Eyes are real.

Qiu Xing (2006) This structure is very similar to a camera. The lens is equivalent to a convex lens, so that the image object is on the retina. The diagrams below A and B are myopia correction lenses (optional: "C" or "D"), which should be used.

Answer: a, d

Drawing problems:

(Guangzhou, 2006) and 13 light-years AB pass through the diameter orbit of the convex lens.

(Chaoyang District, Beijing, 2006), as shown in Figure 9, according to the refraction of light, fill the dotted box with appropriate lenses.

(Leshan, Sichuan, 2006) The lens optical path diagram is shown in figure 1.

(Xiamen, 2006) In figure 12, the light path from the left to the lenticular lens and then to the concave lens is completed.

(Hebei, 2006) according to the following requirements. For the schematic diagram of distant objects imaging in human eyes, please fill in the dotted box in the corresponding lens in Figure B, so that distant objects can be imaged in the retina.

(Taizhou, 2006) Draw the approximate imaging position 10 of the nearsighted object on the map, and mark the image point A' corresponding to the object point A in the image.

(jinzhou area, 2006) and Figure 4 Incident light refracts light.

(Tai 'an, 2006) According to the following two charts or the corresponding answers of refracted light and incident light, refracted light and incident light.

Experimental questions:

Lianyungang (2006) did a convex lens imaging experiment, and the focal length of the lens was 10cm. As shown in the picture below, students still can't get a complete picture of the candle flame after placing candles and lenses and moving the light screen left and right. The reason is. Students adjust appropriately (the distance between objects is constant) and move the light screen and the flame of the candle until Xu Guangping is clear and complete. The nature of the image.

Answer: The flame of the candle, the lens and the center of Xu Guangping are real images with different heights, inverted and enlarged.

(Wuxi, 2006) Xiaoming stood in the same position and took two photos A and B with a digital camera (the focal length can be changed), a famous scenic spot in Wuxi, as shown in the figure. He raised the question: When an object is imaged by a convex lens, what is the relationship between the size of the lens and the focal length? Xiao Ming investigates.

(1) Xiao Ming has some convex lenses, but they don't know the focal length. You gave him a certain lens focal length. (graphic)

(2) To measure the focal length of the convex lens, Xiao Ming has chosen the focal length of 15cm, and the convex lens is 5cm at 10cm. In the experiment, the imaging distance of the material from 35 cm is kept smaller and smaller. Xiao Ming is taking pictures, and your judgment is based on the experimental results, using a camera lens with a larger focal length.

(3) In the process of investigation, Xiao Ming always keeps the distance between objects unchanged and tells you the reason why he did so.

Answer: (1) The convex lens is facing the sun, and the other side is a lens with a piece of paper. Adjust the plane of the paper within the distance of the lens until the smallest point appears on the paper, and the convex lens measuring the distance from this point is convex (otherwise correct it).

(2) the camera lens is used for shooting the focal length of the convex lens of the second photo/>; (3) The distance and focal length of the real image are related to the material, so the distance of the control object remains unchanged.

(Fuzhou, 2006) Please read the following carefully, study the relationship between the size of the real image and the focal length, and answer the questions as required. The human eye

People's eyes are like cameras. The difference between eyes and cameras is that human eyes can obtain clear and restored real images by adjusting the bending degree of the lens with changed focal length, as shown in figure 17; Ordinary cameras become clear after the distance between the object and the image is determined. The adjustment function of the farthest eye that can be seen is called the far point, and the normal eye of the far point is far away. The eyes can see, and the nearest point is called the near point, which is about 10 cm away from the normal eye. Eyes are important organs of human body. Using eyes for a long time, such as reading, watching TV and computer, will lead to eye fatigue. The common symptoms of eye fatigue are headache, brain swelling and dry eyes. The distance at which an object no longer feels tired easily is called hyperopia, and the normal distance of eye vision is 25 cm.

(1) Please fill in.

(2) People's eyes become clear by changing lenses, while ordinary cameras determine the distance of objects in clear images by changing the images.

(3) Based on the above situation, what do you think is normal human eye observation? (Fill in the following options).

A.0? 10cm B. 10 cm？ 25 cm C. 10 cm extreme D. 0? 25 cm

(4) How to prevent eye fatigue, you put forward reasonable suggestions:

Answer: (1) Inverted; (2) The distance between the eyes is 25 cm (or the focal distance (or bending degree) from the object and the image is short; (c) (3) (4), like this? Read a book in the middle, have a proper rest or do eye exercises.

As shown in figure (Fuzhou), in figure 12, Zhou Qian and several students are doing experiments to explore the legal reality of Xu Guangping's convex lens imaging and clearly define a narrow and reasonable inverted image. At this time, under the action of candles and convex lenses (close to the lenses) on Zhou Qian students' own glasses, the original image of Xu Guangping became blurred.

(1) In order to make the light curtain clear, how to make the mask correct under the premise of the same position of the candle and the lens?

_________________________________________________________________

(2) Four small pictures, as shown in figure 13, show the imaging situation of students' myopia and the corrective measures ()

a，②①B，①③C，②④D，③④

Answer: (1) The optical screen is far away from the convex lens; (2) b

(Shaoguan, 2006) Xiao optical platform, convex lens (focal length is 10 cm), candle and match Xu Guangping, doing experiments to explore the imaging law of convex lens.

(1) optical bench put a convex lens, a light screen and a candle (bottom left) on the three sliders A, B and C respectively, which should be placed in B: Experimental findings.

(2) The light screen is imaged on the right. What do you think is the reason for this phenomenon?

(3) Observing and recording convex lens imaging, measuring and summing.

(4) Place the candle away from the convex lens 16cm and move Xu Guangping Xiaoming (fill in "Yes" or "No clear image") and Xu Guangping back and forth.

(5) Xiao Ming blocks half a convex lens with opaque cardboard and then moves the screen back and forth. male

(Fill in "can" or "can't") What you see on the screen.

Answer: (1) Convex lens (2) Candle, convex lens and the three centers on the light screen are at different levels.

(3) the distance of the object; Image distance (4)(5)

(Nantong, 2006) Experiment on imaging law of convex lens on optical platform;

(1) As shown in the figure, measure the focal length of a convex lens with a focal length of _ _ _ _ cm.

(2) The candle, convex lens and light screen on the optical bench are upside down. Adjust the flame of the candle, and the convex lens mask is in the center of the lit candle, which is about _ _ _ _ _ _ _ _ _ _ _ _ _.

(3) When the flame candle moves 30 cm from the convex lens to the light screen, the light screen is obviously inverted.

For example _ _ _ _. _ _ _ _ _ _ is a routine work using imaging (filling optical instruments).

Answer: (1)9.4(9.2-9.5)(2) Same height (3) Reduced; camera

Inner Mongolia (2006) gives you a shot. I don't know whether it is a convex lens or a concave lens. You wrote a simple judgment method.

A: (1)

(2)

(3 )

Answer: (1) The lens of sunlight (parallel light source) moves, and a bright spot on the other side indicates a convex lens.

(2) Touching the thick edge and the thin edge in the middle is described as a convex lens.

() Light the candle. In view of whether the point on the other side of the screen is imaged, the image is a convex lens.