7.
On what principle does the action of a
pinhole camera depend?
8.
How does a change in the distance of the
object from a pinhole camera affect the size
of the image?
9. What happens when a ray of light falls on a
plane mirror?
Answers
7)=
rectilinear theory of light
Pinhole cameras rely on the fact that light travels in straight lines – a principle called the rectilinear theory of light. This makes the image appear upside down in the camera....
8)=
When you place an object in front of the pinhole camera, a clear image is formed on the screen. ... 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.....
9)=
As ray of light falls normally on mirror this means that angle of incidence is 0o. From second law of reflection we know that angle of incidence is equal to angle of reflection. So angle of reflection will also be zero. Therefore the light ray will be reflected back along the same path....
Answer:
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