Refractive Index of a Glass Slab using a Travelling Microscope NEET Questions

Physics - Experimental Skills

Refractive Index of a Glass Slab using a Travelling Microscope MCQ Questions


1.
Refractive index of a medium is defined as:
A.
Wavelength of light
B.
Speed of light in medium
C.
Frequency of light
D.
The ratio of speed of light in vacuum (c) to speed of light in the medium (v): n = c/v
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ANSWER :
D. The ratio of speed of light in vacuum (c) to speed of light in the medium (v): n = c/v
2.
The refractive index of a transparent material:
A.
Can be negative
B.
Is always 0
C.
Is always greater than 1 (light slows down in a denser medium)
D.
Is always less than 1
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ANSWER :
C. Is always greater than 1 (light slows down in a denser medium)
3.
Snell's law of refraction is:
A.
n₁ + θ₁ = n₂ + θ₂
B.
n₁ × n₂ = sin(θ₁ + θ₂)
C.
n₁/n₂ = sin θ₁ × sin θ₂
D.
n₁ sin θ₁ = n₂ sin θ₂
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ANSWER :
D. n₁ sin θ₁ = n₂ sin θ₂
4.
The refractive index of crown glass is approximately:
A.
1.0
B.
2.0
C.
1.5 (typical for ordinary glass)
D.
0.5
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ANSWER :
C. 1.5 (typical for ordinary glass)
5.
Refractive index depends on:
A.
Just on color
B.
Just on temperature
C.
Just on time
D.
Wavelength of light (dispersion) and the medium
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ANSWER :
D. Wavelength of light (dispersion) and the medium
6.
In a glass slab, light enters at the top surface, refracts, travels through glass, and exits at the bottom surface. The emergent ray is:
A.
Perpendicular
B.
At 45°
C.
Reflected back
D.
Parallel to the incident ray (laterally shifted, but same direction)
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ANSWER :
D. Parallel to the incident ray (laterally shifted, but same direction)