A ray of light falls on a prism ABC (AB=BC) and travels as shown in figure. The refractive index of the prism material should be greater than:

                   

1. \(4 /{3}\) 2. \( \sqrt{2}\)
3. \(1.5\) 4. \( \sqrt{3}\)
Subtopic:  Prisms |
 79%
From NCERT
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The refractive index of the material of a prism is 2 and its refracting angle is \(30^{\circ}\). One of the refracting surfaces of the prism is made a mirror inwards. A beam of monochromatic light entering the prism from the other face will retrace its path after reflection from the mirrored surface if its angle of incidence on the prism is:
1. \(60^{\circ}\)
2. \(0^{\circ}\)
3. \(30^{\circ}\)
4. \(45^{\circ}\)

Subtopic:  Prisms |
 79%
From NCERT
AIPMT - 2004
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