Ray Optics Test

Result

Ray Optics Test - 43

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Weekly Quiz Competition

Question 1
4 / -1

A thin prism of 3^o, angle made from glass of refractive index 1.5 is combined with another thin prism made from glass of refractive index 1.3 to produce dispersion without deviation. what is the angle of Prism of second prism.

A
3^o

B
–3^o

C
-5^o

D
5^o

Solution
Question 2
4 / -1

If a ray of light is incident on a plane mirror at an angle of 30^o then deviation produced by a plane mirror is____________.

A
60^o

B
90^o

C
120^o

D
150^o
Question 3
4 / -1

The frequency of a light wave in a material is 4 × 10¹⁴ Hz and wave length is 5000 Å. The refractive index of material will be____________ (take c = 3 × 10⁸ ms^–1)

A
1.5

B
1.7

C
1.33

D
None of these

Solution
Question 4
4 / -1

Mono chromatic light of wavelength 399 nm is incident from air on a water (n = 1.33) Surface. The wavelength of refracted light is ________________nm

A
300

B
600

C
333

D
443
Question 5
4 / -1

If the refractive index of a material of an equilateral Prism is √3, then angle of minimum deviation will be ____________.

A
50^o

B
60^o

C
39^o

D
49^o
Question 6
4 / -1

If the critical angle for total internal reflection from a medium to vacuum is 30^o then velocity of light in the medium is _____________ms^–1 (take c = 3.0 × 10⁸ ms^–1)

A
2.0 × 10⁸

B
1.5 × 10⁸

C
10⁸

D
1.5 × 10^–8
Question 7
4 / -1

A ray of light passes from glass (n = 1.5) to medium (n = 1.60) The value of the critical angle of glass is___________.

A

B

C

D
Question 8
4 / -1

A double convex lens of focal length 6 cm is made of glass of refractive index 1.5, The radius of curvature of one surface is double than that of the other surface. The value of small radius of curvature is_________.

A
6

B
9

C
12

D
4.5

Solution
Question 9
4 / -1

When a ray of light enters in a transparent medium of refractive index n, then it is observed that the angle of refraction is half of the angle of incidence. The value of angle of incidence will be _________.

A

B

C

D

Solution
Question 10
4 / -1

A prism of glass is shown in figure A, ray incident normally on one face is totally reflected. If θ is 45^o , the index of refraction of glass is_____________.

A

B

C
= 2

D
None of these

Solution