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 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 |
To view explanation, please take trial in the course below.
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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 |
To view explanation, please take trial in the course below.
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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 |
To view explanation, please take trial in the course below.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology