中四波動學問題

點解無論實像同虛像都能為肉眼所見同用相機拍下來?

Actually, the word [image], irrespective it is real or vitual, indicates something that you can see. If you do not see anything at all, there is no [image]

Whenever there is light rays entering your eye, you could see an image located at the point of intersection of these rays. Because an image is the position from where light rays are emerged (for real image) or seen to be emerged (for vitual image), the eye thus could see the image.

但實像可投影到屏幕上 虛像唔得....學校投影機又點解釋?

The image formed by a projector is a real image. What you see on the screen are light rays reflected by the screen to your eye.

相長干涉的能量是不是來自相消干涉的能量?點解?

Yes, because of the law of conservation of energy. Interference is a process that leads to re-distribution of light energy.

不如叫你父母辛苦d,比d錢你補習啦,係到比人教錯你就唔好,可能到時你會聰明d