The following shadows and physical knowledge are incorrect: () A. Hand shadow-linear propagation of light B. Photography-light.

A, when light travels in a straight line, it encounters an opaque object, and the dark area behind the object is a shadow, and the hand shadow is formed by the straight line propagation of light, so A is correct;

B, the lens in photography is a convex lens, which is used for imaging. Convex lens imaging is the refraction of light, which has nothing to do with the reflection of light, so B is incorrect;

C, the lens of the film is a convex lens, which is an inverted enlarged real image, so C is correct;

D, the calm water surface is equivalent to a flat mirror, and the reflection under the water surface is the image of this flat mirror, so D is correct.

The choice of this question is incorrect, so choose B.