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Q.

Is it true that the letters appear to be raised to the same height if we replace a glass slab with a transparent plastic slab?


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a

True

b

False 

answer is B.

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Detailed Solution

The above statement is False.
Letters appear to be raised due to the refractive index of the glass slab when we see the letters through the glass slab, but if we replace the glass slab with a transparent plastic slab, it will have a different refractive index, and hence the amount of raising of letters will also differ.
The correct statement would be that letters do not appear to be raised to the same height if we replace a glass slab with a transparent plastic slab.
 
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