Graphic photos, physical text.

The new version of physics textbooks gives people a refreshing and illustrated feeling. The introduction of a large number of illustrations and photos in the book not only beautifies the layout, but also pays more attention to the organic combination with the teaching content, which plays an irreplaceable role in text description.

For example, the close-up photo of crystal clear water droplets on the cover of the first volume of Physics published by People's Education Publishing House is rigorous in composition and uses the golden section principle in photography technology, and the position of water droplets is in the visual center of the photo. Secondly, through the contrast between reality and reality, the background is blurred, and the theme water drops are highlighted, giving people beautiful visual enjoyment. It is a masterpiece. It is worth pointing out that the water droplets are shot with exquisite light, and the water droplets are crystal clear under the backlight.

The photos of water droplets on the cover are not only artistic and ornamental, but also contain some scientific information and physical knowledge. Try to analyze them as follows:

1. The crystal-clear water droplets refract the inverted flower image, which is an important physical phenomenon, the principle of refraction imaging of light, and the convex surface of the water droplets acts as a convex lens.

2. The bent flower stems conceal another physical phenomenon, gravity. Under the action of gravity, the upward-extending flower stem bends downward because of the gravity from the earth and the gravity of the flowers at the top of the flower stem, which further verifies that the direction of gravity is vertical downward.

3. The rich colors in the photo come from flowers: the selection, absorption and transmission of the spectral reflection of sunlight. The yellow and green colors in the photo are selective reflection, white total reflection spectrum, black total absorption solar spectrum, glittering and translucent water droplets imaging, most refraction and a small part reflection. As P94, the first volume of physics, points out, "When light shines on an object, part of it is reflected by the object, and the other part is reflected by the object." If the object is transparent, some light will pass through the object, and different objects will reflect, absorb and transmit different colors of light, so they will show different colors. "。

4. The position of water drops on the flower stem is below the flower stem, which shows a downward trend, indicating that the water drops are under the action of gravity. The disc on the surface of water droplets reveals the existence of surface tension of water molecules, and under the action of surface tension of water molecules, the surface of water droplets shrinks into a sphere.

If we are interested in further exploring the distribution of water droplets on the flower stem, we can find out why the curved flower stem only leaves water droplets at its top. As can be seen from the figure, the water drops on the left and right sides of the flower stem are slightly deformed, showing a trend of bending (circular motion) to the left and right. If we analyze the force of the water drop, it is obvious that the component of the gravity of the water drop and the static friction generated by the contact surface between the water drop and the flower stem have reached a static balance.

6. The difference between the flower image on the convex surface of the water drop and the flower image on the convex lens of the camera further proves that the imaging conditions of the convex lens are related to focal length, object distance and image distance, which can be further expressed by imaging formula.

To sum up, a photo covers a wide range of information and scientific knowledge. With the development and popularization of information society, people pay attention not only to the breadth and depth of scientific knowledge acquisition, but also to the speed of knowledge acquisition. The data shows: "It takes ten seconds for people to know the same thing with words, five and a half seconds with pictures and three to four seconds with photos. It can be seen that the emergence of photographic images has greatly accelerated the dissemination and exchange of scientific information. "

A large number of pictures are used in the new physics textbook, which shows the ingenuity of the editor and the informationization of my ability. This is just as implied in the back cover of the textbook: "The role of water droplets is equivalent to a convex lens, and the image of another flower can be seen through the water droplets. Are these images real or virtual? " The editor's clever questioning and finishing touch will further stimulate students' interest in learning physics. The pursuit of conclusion will further cultivate students' practical ability and rigorous attitude in exploring science.

Undoubtedly, compared with the past, the new textbook pays more attention to the unity of interest and scientificity of knowledge, the unity of theory and practice, and is closer to the needs of students to learn and master knowledge, which fully reflects that the new textbook is more conducive to implementing the educational policy of the party and the country and implementing quality education, and is more conducive to the all-round development of students, the cultivation and improvement of innovative spirit and practical ability.

It should be pointed out that reading textbooks to acquiring knowledge with pictures and texts is a new breakthrough and leap in education and teaching. With the help of photos, the effective ways for students to acquire knowledge are broadened, and the learning methods are faster, more intuitive, more vivid and more efficient, which will be more conducive to teaching and scientific research.

Nowadays, scientific research is inseparable from words, and pictures are even more indispensable. The teaching of physics in junior high school is also inseparable from pictures. Illustration is an extension of primary school students' speaking, cognitive knowledge and learning methods, which is conducive to the convergence and improvement of junior high school students' learning methods and habits. They are indispensable and effective means of junior high school teaching, and they reflect the innovative consciousness of today's teaching purpose.