Ray Optics Test

Result

Ray Optics Test - 124

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Weekly Quiz Competition

Question 1
4 / -1

The phenomenon utilized in an optical fibre is

A
Refraction

B
Interference

C
Polarization

D
Total internal reflection
Question 2
4 / -1

The velocity of light in a medium is half its velocity in air. If ray of light emerges from such a medium into air, the angle of incidence, at which it will be totally internally reflected, is

A
15°

B
30°

C
45°

D
60°

Solution
Question 3
4 / -1

A ray of light propagates from glass (refractive index= 3/2) to water (refractive index = 4/3). The value of the critical angle

A

B

C

D

Solution
Question 4
4 / -1

Relation between critical angles of water and glass is

A
C_w>C_g

B
C_wg

C
C_w=C_g

D
C_w>C_g = 0

Solution
Question 5
4 / -1

Optical fibres are related with

A
Communication

B
Light

C
Computer

D
None of these
Question 6
4 / -1

Brilliance of diamond is due to

A
Shape

B
Cutting

C
Reflection

D
Total internal reflection
Question 7
4 / -1

The critical angle for a medium is 60°. The refractive index of the medium is

A

B

C

D

Solution
Question 8
4 / -1

Glass has refractive index µ with respect to air and the critical angle for a ray of light going from glass to air is θ. If a ray of light is incident from air on the glass with angle of incidence θ, the corresponding angle of refraction is

A

B
90°

C

D

Solution
Question 9
4 / -1

An endoscope is employed by a physician to view the internal parts of a body organ. It is based on the principle of

A
Refraction

B
Reflection

C
Total internal reflection

D
Dispersion
Question 10
4 / -1

A normally incident ray reflected at an angle of 90°. The value of critical angle is

A
45°

B
90°

C
65°

D
43.2°

Solution