Aerial photographers take pictures of the city from high altitude. If the focal length of the camera lens used is 80mm, the distance between the film and the lens should be _______ (fill in "greater t

Aerial photographers take pictures of the city from high altitude. If the focal length of the camera lens used is 80mm, the distance between the film and the lens should be _______ (fill in "greater than

Answer: Aerial photographers take pictures of the city from high altitude. If the focal length of the camera lens used is 80mm, the distance between the film and the lens should be _greater than_ (fill in "greater than" or "less than") 80mm. The resulting image is a reduced, _inverted__ (fill in "inverted" or "upright") ___real__ (fill in "real" or "virtual") image

Explanation: This The problem is actually equivalent to the imaging principle of a convex lens. Although the actual lens is not one lens but a set of lenses, it is obviously simplified into one lens, so the distance between the film and the lens is the image distance. The image distance must be greater than the focal length. Otherwise, the image cannot be formed. Then the light rays actually converge to form a real image instead of a virtual image. The last situation is inverted, the same as that of a convex lens.