Ray Optics Test

Result

Ray Optics Test - 139

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Weekly Quiz Competition

Question 1
4 / -1

Fraunhoffer spectrum is a

A
Line absorption spectrum

B
Band absorption spectrum

C
Line emission spectrum

D
Band emission spectrum
Question 2
4 / -1

A beam of light composed of red and green ray is incident obliquely at a point on the face of rectangular glass slab. When coming out on the opposite parallel face, the red and green ray emerge from

A
Two points propagating in two different directions

B
Two points propagating in two parallel directions

C
One point propagating in two different directions

D
One point propagating in the same directions
Question 3
4 / -1

Which of the following spectrum have all the frequencies from high to low frequency range

A
Band spectrum

B
Continuous spectrum

C
Line spectrum

D
Discontinuous spectrum
Question 4
4 / -1

Stars are not visible in the day time because

A
Stars hide behind the Sun

B
Stars do not reflect Sun rays during day

C
Stars vanish during the day

D
Atmosphere scatters sunlight into a blanket of extreme brightness through which faint stars cannot be visible
Question 5
4 / -1

Which of the following colours suffers maximum deviation in a prism?

A
Yellow

B
Blue

C
Green

D
Orange
Question 6
4 / -1

If a thin prism of glass is dipped into water then minimum deviation (with respect to air) of light produced by prism will be left

A
1/2

B
1/4

C
2

D
1/5

Solution
Question 7
4 / -1

If the angle of prism is 60° and the angle of minimum deviation is 40° , the angle of refraction will be

A
30°

B
60°

C
100°

D
120°

Solution
Question 8
4 / -1

The deviation caused in red, yellow and violet colours for crown glass prism are 2.84°, 3.28° and 3.72° respectively. The dispersive power of prism material is

A
0.268

B
0.368

C
0.468

D
0.568

Solution
Question 9
4 / -1

Dispersion of light is due to

A
Wavelength

B
Intensity of light

C
Density of medium

D
None of these
Question 10
4 / -1

Which of the prism is used to see infrared spectrum of light

A
Rock Salt

B
Nicol

C
Flint

D
Crown