- taoloLv 51 十年前最愛解答
2. when a plane mirror rotateθ, the reflected ray will be rotate 2θto the direction of the mirror rotate, so (1) and (2) are both correct.
The application of 2 plane mirror put in 90o is to reflect the light ray which is parallel to the inclined ray. So (3) is also correct.
So the answer is D
All of them could actually be show in ray diagram.
5. when a glass block put between the lens and S, we could consider the distance between S and the lens is longer than that of actual length.(refraction) So we could consider it is a object between f and 2f. By the ray diagram(HKCEE knowledge), we can get the answer is A.
2007-04-20 01:29:44 補充：