PhysicsWhat happens to the shadow on the screen when the distance between the source of light and the object decreases?

What happens to the shadow on the screen when the distance between the source of light and the object decreases?


  1. A
    Smaller
  2. B
    Larger
  3. C
    No change
  4. D
    None of the above 

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    Solution:

    Concept- The light rays must bend more to pass through the borders of the item when the light source is closer to the object than when the object is further from the light source.
    We'll start off by talking about a few pinhole camera-related topics. Pinhole cameras use the rectilinear theory of light propagation. Placing an item in front of the pinhole camera causes a translucent picture to appear on the screen. The image captured by the pinhole camera is backwards. One ray from each point on the object travels through the pinhole and onto the screen since the pinhole camera's aperture is so small (near in diameter) . As a result, there is one-to-one coordination between the points on the object and the points on the screen.
    The size of the shadow will rise as the distance between the light source and the item is reduced since less light will fall on the screen. The shadow will, however, get smaller as the distance between it and the light source increases since more light will hit the screen.
    Hence, the correct option is 1.
     
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