Question

what is the effect on the image in the pin hole camera if the luminous object is moved towards the pin hole ?

Answer 1

If the distance between the pinhole and screen is reduced, the size of the image will decreaseand 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.