Light enters at an angle of incidence in a transparent rod of refractive index n. For what value of the refractive index of the material of the rod, will the light, once entered into it, not leave it through its lateral face whatsoever be the value of the angle of incidence?
1. n >2
2. 1.0
3. 1.3
4. 1.4

Subtopic:  Total Internal Reflection |
 73%
From NCERT
AIPMT - 1998
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A rainbow is formed due to:

1. Scattering & refraction
2. Total internal reflection & dispersion
3. Reflection only
4. Diffraction and dispersion

Subtopic:  Total Internal Reflection |
 80%
From NCERT
AIPMT - 2000
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A disc is placed on the surface of a pond which has a refractive index of 53. A source of light is placed 4 m below the surface of the liquid. Find The minimum radius of a disc so that light does not come out from it.
1.  ∞
2.  3 m
3.  6 m
4.  4 m

Subtopic:  Total Internal Reflection |
 78%
From NCERT
AIPMT - 2001
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Optical fibre is based on:
1. Total internal reflection
2. Less scattering
3. Refraction
4. Less absorption coefficient

Subtopic:  Total Internal Reflection |
 93%
From NCERT
AIPMT - 2001
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For the given incident ray as shown in the figure, in the condition of the total internal reflection of this ray, the minimum refractive index of the prism will be:

       

1. 3+12

2. 2+12

3. 32

4. 76

Subtopic:  Total Internal Reflection |
 55%
From NCERT
AIPMT - 2002
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