What happens to the shadow formed on a screen when
(a) the distance between the source of light and the object increases a
(b) the distance between the object and the screen decreases?
Answers
Explanation:
A) the shadow increases in size.. As the distance increases and the object cimes nearer ti the screen
B) the size decrease and starts moving downwardz
Answer:
Pinhole cameras use the principle of rectilinear propagation of light. When you place an object in front of the pinhole camera, a clear image is formed on the screen. The image formed on the pinhole camera is inverted. Since the aperture of the pinhole camera is small (a diameter close to 5mm) only one ray from each point on the object passes through the pinhole and moves on to the screen. Thus there is one-to-one correspondence between the points on the object and the points on the screen.
If the distance between the pinhole and screen is reduced, the size of the image will decrease and the image will become bright since the light spreads over a small area. If the distance between the pinhole and screen is increased, the image size will increase and the image however will get less bright since the light spreads over a large area.