Ray Optics Test

Result

Ray Optics Test - 9

Score
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Rank
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Weekly Quiz Competition

Question 1
4 / -1

If angle of incidence is twice the angle of refraction in a medium of refractive index μ, then angle of incidence is

A

B

C

D
Question 2
4 / -1

When a ray of light enters a glass slab from air

A
its wavelength decreases

B
its wavelength increases

C
its frequency increases

D
neither its wavelength nor its frequency changes
Question 3
4 / -1

The optical path of monochromatic light is same if it goes through 4.0 cm of glass of 4.5 cm of water. If the refractive index of glass is 1.53, the refractive index of the water is

A
1.30

B
1.36

C
1.42

D
1.46
Question 4
4 / -1

The refractive indices of glass and quartz w.r.t. air are 3/2 and 12/5, respectively. The refractive index of quartz w.r.t. glass is

A
8/5

B
5/8

C
5/18

D
18/5
Question 5
4 / -1

A point source of light is kept at a depth of h in water of refractive index 4/3. The radius of the circle at the surface of water through which light emits is

A

B

C

D
Question 6
4 / -1

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

A
1.40

B
1.50

C
3.00

D
1.33

Solution
Question 7
4 / -1

A light moves from denser to rarer medium. Which of the following is correct?

A
Energy increases

B
Frequency increases

C
Phase changes by 90°

D
Velocity increases
Question 8
4 / -1

Maximum lateral displacement of a ray of light incident on a slab of thickness t is

A

B

C

D
t
Question 9
4 / -1

When a ray of light is incident normally on a surface, then

A
total internal reflection takes place

B
it passes undeviated

C
it undergoes dispersion

D
it gets absorbed by the surface
Question 10
4 / -1

A focal length of a lens is 10 cm. What is power of a lens in dioptre?

A
0.1 D

B
10 D

C
15 D

D
1 D

Solution