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Question: Answered & Verified by Expert
A plane glass slab is kept over various colour letters, the letter which appears least raised is :
PhysicsRay OpticsJIPMERJIPMER 2006
Options:
  • A red
  • B violet
  • C green
  • D blue
Solution:
1811 Upvotes Verified Answer
The correct answer is: red
Refractive index
$\mu=\frac{\text { real depth }}{\text { apparent depth }}$
For red colour, refractive index is minimum, i.e., it will have maximum apparent depth and hence, appears least raised.

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