Why does the camera retract when the camera shoots the vision?
Resolution: The camera lens is equivalent to a convex lens. After the lens is a dark box, the film installed in the bottom of the black box, the film is equivalent to the screen; when the film after the film, and then take a single image, like to become larger. When imaging to make things larger, objects should be reduced, while increasing the distance, that is, elongated black box or the lens forward. From the above analysis we can see that the correct choice for this question is B.
Analysis: According to the principle of camera imaging, when the object distance decreases, the image becomes larger, to get a clear picture on the film, the box should be appropriate to elongate some, at the same time, the film will be slightly larger than the original image The
In this case, the bottom of the object in the case of water and anhydrous, the distance relative to the camera lens is different; due to the refraction of light, the pool of water is equivalent to the object distance is reduced. According to the imaging principle, the correct option is C.
On the contrary, if you can like to be able to take pictures on the photo, the image will become smaller, according to the "object distance increases, like the distance becomes smaller, like a small" rule, from the camera (object distance) should be far , While the film from the lens (like distance) should be close, that the lens should be back to shrink, so as to be closer to the film.
The following is the same type of problem:
Example 5 When shooting the object at the bottom of the pool with a camera, if the position of the camera is kept constant, there is water and no water in the pool (assuming that the two objects are large) ()
A. Dark box should be slightly shorter, get like will be slightly larger
B. Dark box should be slightly shorter, get like will be slightly smaller
C. Dark box should be slightly longer, get like will be slightly larger
D. Dark box should be slightly longer, get like will be slightly smaller
A student shoot graduation photo, want to take a single image. The photographer should take the method ()
A. So that the camera close to the students, while the lens back shrink, from the film near
B. So that the camera close to the students, while the lens forward stretch, away from the film far
C. So that the camera away from classmates, while the lens back shrink, from the film near
D. So that the camera away from the students, while the lens forward stretch, away from the film far
