Find the value of the angle of emergence from the prism given below for the incidence ray shown. The refractive index of the glass is $\sqrt{3}$.

1. $45°$

2. $90°$

3. $60°$

4. $30°$

Subtopic:  Refraction at Plane Surface |
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An air bubble in a glass slab with a refractive index 1.5 (near-normal incidence) is 5 cm deep when viewed from one surface and 3 cm deep when viewed from the opposite surface. The thickness (in cm) of the slab is:
1. 8
2. 10
3. 12
4. 16

Subtopic:  Refraction at Plane Surface |
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The frequency of a light wave in a material is 2×1014 Hz and wavelength is 5000 Å. The refractive index of material will be:

1. 1.40

2. 1.50

3. 3.00

4. 1.33

Subtopic:  Refraction at Plane Surface |
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A beam of light composed of red and green rays is incident obliquely at a point on the face of a rectangular glass slab. When coming out on the opposite parallel face, the red and green rays emerge from:

 1 Two points propagating in two different parallel directions 2 One point propagating in two different directions through the slab 3 One point propagating in the same direction through the slab 4 Two points propagating in two different non-parallel directions
Subtopic:  Refraction at Plane Surface |
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A ray of light travelling in the air has wavelength λ, frequency n, velocity v and intensity I. If this ray enters into water then these parameters are λ', n', v' and I' respectively. Which relation is correct?
1.  λ = λ′
2.  n = n′
3.  v = v′
4.  I = I′

Subtopic:  Refraction at Plane Surface |
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A bubble in glass slab (µ = 1.5) when viewed from one side appears at 5 cm and 2 cm when viewed from the other side. Thickness of the slab is:

1. 3.75 cm

2. 3 cm

3. 10.5 cm

4. 2.5 cm

Subtopic:  Refraction at Plane Surface |
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