Physics
Grade-10
Easy
Question
Planets can be considered as _____ sources of light.
- Point-sized
- Extended
- Yellow
- None of the above
Hint:
Point-sized = It is that source of light which forms only the umbra region on the screen of the shadowed object
The correct answer is: Extended
Point-sized = It is that source of light which forms only the umbra region on the screen of the shadowed object
Examples: Light from a distant star seen through a small telescope. Light passing through a pinhole or other small aperture, viewed from a distance much greater than the size of the hole. Light from a street light in a large-scale study of light pollution or street illumination.
Planets can be considered as _Point-sized ____ sources of light.
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