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Answer:9. A pinhole camera is a simple camera without a lens but with a tiny aperture (the so-called pinhole) – effectively a light-proof box with a small hole in one side. Light from a scene passes through the aperture and projects an inverted image on the opposite side of the box, which is known as the camera obscura effect.
11. an image that you see in a mirror, in water or on a shiny surface.
8. During an eclipse, two shadows are cast. The first is called the umbra (UM bruh). This shadow gets smaller as it goes away from the sun. It is the dark center of the eclipse shadow. The second shadow is called the penumbra.
10. An inverted image is formed in a pinhole camera because the light rays coming from the top and bottom of the object intersect at the pinhole. Thus, we get an upside down image in a pinhole camera due to linear propagation of light through the hole of the pinhole camera.
12. A pinhole camera works on a simple principle. Imagine you are inside a large, dark, room-sized box containing a pinhole. ... Each point in the scene emits light, and, just like the flashlight, the beam of light from that point passes through the pinhole and creates a point of light on the back wall.
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