Observe the picture given in the figure. Even when a sheet of some material is placed at position ‘P’, still the patch of light is obtained on the screen. What is the type of material of this sheet?

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Solution

If the patch of light is still visible on the screen, that means a transparent material has been placed at point P which allowed the light to pass through it without any obstruction.

Transparent materials are the ones which allow light to pass through them completely. Glass is an example of a transparent material.

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