pls answer the following question. it's urgent.
Answers
Answer:
C). Answer:
There are two effects. First, the size of the pinhole affects the amount if light that reaches the film. The smaller the hole, the less light is let in, so the smaller the pinhole, the larger the f/ number and as a result the longer an exposure has to be to allow sufficient light to hit a sensor or film. Second, the smaller the pinhole, the sharper the image—but only up to a point, because the smaller the pinhole the greater the visible effect of diffraction by the edges of the hole on the light waves. If you’re making a pinhole camera, experiment. If you’re buying one, the safest bet is to start with the pinhole the manufacturer supplies.
d)answer:The size and nature of shadow depends on the source of light and the position of the object with respect to the source and the screen.
Answer:
C. The biggest the pinhole the softer the image and the shorter the required exposure . when the pinhole become as small as a few hundred wavelengths of light diffraction starts to affect the image too
D . It's depend on the source of light and the position of the object with respect to the source and the screen .