Ray Optics Test

Result

Ray Optics Test - 37

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

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

A

B

C

D

Solution
Question 2
4 / -1

An under water swimmer is at a depth of 12 m below the surface of water. A bird is at a height of 18 m from the surface of water, directly above his eyes. For the swimmer, the bird appears to be at a distance X from the surface of water. (Refractive index of water is 4/3). The value of X is

A
24 m

B
12 m

C
18 m

D
9 m

Solution
Question 3
4 / -1

Fraunhofer spectrum is a

A
line absorption spectrum

B
band absorption spectrum

C
line emission spectrum

D
band emission spectrum
Question 4
4 / -1

An equilateral prism is placed on the prism table of a spectrometer in the position of minimum deviation. If the angle of incidence is 60º, the angle of deviation of the ray is

A
90º

B
60º

C
45º

D
30º

Solution
Question 5
4 / -1

Three glass prisms A, B and C of the same refractive index are placed in contact with eachother as shown in Fig with no air gap between the prisms. A monochromatic ray of light OP passes through the prism assembly and emerges as QR. The condition of minimum deviation is satisfied in the prism.

A
A and C

B
B and C

C
A and B

D
A, B and C
Question 6
4 / -1

A ray falls on a prism ABC (AB = BC) and travels as shown in Fig. The minimum refractive index of the prism material should be

A

B

C

D

Solution
Question 7
4 / -1

In a thin prism of glass g (a_µg = 1.5) , which of the following relations between the angle of minimum deviation δ_m and angle of refraction r will be correct?

A
δ_m = r

B
δ_m = 1.5 r

C
δ_m = 2r

D
δ_m = r/2

Solution
Question 8
4 / -1

If a monochromatic green light is incident on a phosphorescent substance, the colour of light emitted by it is

A
Same green colour

B
Nearer to red in the spectrum of white light

C
Nearer to violet in the spectrum of white light

D
White colour
Question 9
4 / -1

A ray of light is incident at an angle of 60º on one face of a prism of angle 30º. The emergent ray of light makes an angle of 30º with incident ray. The angle made by emergent ray with second face of prism will be

A
0º

B
90º

C
45º

D
30º

Solution
Question 10
4 / -1

Two lenses in contact form an achromatic lens. Their focal lengths are in the ratio 2:3. Their dispersive powers must be in the ratio of

A
1 : 3

B
3 : 3

C
3 : 2

D
3 : 1

Solution