Free Printable QUIZ

1.

On reflection of light from rarer to denser medium, the light waves suffers a phase difference of

a)

2 $\pi$

b)

$\frac{\pi}{2}$

c)

$\pi$

d)

0

2.

When a light travels from one medium to other, which of the following does not change

a)

Wavelength

b)

frequency

c)

Amplitude

d)

Velocity

3.

The angle of reflection of light is $60\degree$ on the surface of a transparent liquid. Find the refractive index of the liquid

a)

1

b)

1.44

c)

2

d)

1.73

4.

The velocity of light in vacuum is $3\times10^{10}$ cm/s. The velocity of light in medium is (R.I = 1.5)

a)

$2\times10^{10\ }$ cm/s

b)

$4.5\times10^{10}$ cm/s

c)

$1.5\times10^{10}$ cm/s

d)

0

5.

A convergent lens will become less convergent in

a)

Oil

b)

water

c)

Both

d)

None

6.

A light ray traveling in the denser medium has refractive index 1.41. Find the critical angle?

a)

$33\degree$

b)

$55\degree$

c)

$45\degree$

d)

$67\degree$

7.

Total Internal reflection occurs when the light travels from

a)

A rarer medium to denser medium

b)

A denser medium to rarer medium

c)

A rarer medium to denser medium with angle of incidence grater than critical angle

d)

A denser medium to rarer medium with angle of incidence grater than critical angle

8.

Consider two mediums in which one medium has R.I of 1.60 and the other has 1.33. Find the minimum angle for incidence for which the light ray undergo Total internal reflection.

a)

$66\degree$

b)

$90\degree$

c)

$45\degree$

d)

$57\degree$

9.

The greater the value of refractive index of a medium, the bending of light will be

a)

Greater

b)

lesser

c)

No change

d)

None

10.

Two independent light sources having same wavelength and same amplitude. Can they act as coherent sources?

a)

YES

b)

NO

c)

May be

d)

can't say

11.

Young's Double experiment has explained the following

a)

Wave nature of light

b)

proved the existence of Interference of light.

c)

Both of the above

d)

None

12.

The mathematical condition for constructive interference is given by

a)

$\ \delta=n\lambda\ ;\ n\ =\ 1,2,3,4,....$

b)

$\ \delta=n\lambda\ ;\ n\ =\ 0,1,2,3,4,....$

c)

$\ \delta=\left(n+1\right)\lambda\ ;\ n\ =\ 0,1,2,3,4,....$

d)

None

13.

Two waves are represented by y1=3sin(wt) and y2=4cos(wt). If both waves are superimposed, then the amplitude of the resultant wave is

a)

1

b)

3

c)

4

d)

5

14.

Two waves are represented by y1=3sin(wt) and y2=4sin(wt). If both waves are superimposed, then the amplitude of the resultant wave is

a)

5

b)

36

c)

$\sqrt[]{37}$

d)

7

15.

What is meant by monochromaticity?

a)

light waves having same amplitude.

b)

Light waves having same velocity

c)

Light waves having same wavelength.

d)

light waves having same intensity

16.

Interference pattern is characterized by

a)

All dark fringes

b)

All bright fringes

c)

bright and dark fringes

d)

bright and dark fringes equally spaced

17.

Path difference between the waves which undergo interference is

a)

Constant

b)

Zero

c)

Both the above

d)

None

18.

Choose the correct method to produce coherent source.

a)

Division of wavelength

b)

Division of Amplitude

c)

Division of Wavefront

d)

ALL

19.

When Two waves of same amplitude add constructively, the intensity becomes

a)

Double

b)

Half

c)

Four times

d)

one fourth

20.

What happens to the Interference pattern if the phase difference between the two sources varies continuously?

a)

Brightens

b)

No change

c)

Disappears

d)

None

21.

Newton's rings are fringes of equal

a)

thickness

b)

inclination

c)

radii

d)

all

22.

If a drop of liquid is introduced into the gap between the convex lens and glass plate in newtons experiment, the rind diameter

a)

decrease

b)

increase

c)

constant

d)

change in shape

23.

A thin film is viewed in white light, the color of the film seen at a particular point depends on

a)

Angle of observation

b)

thickness of the film

c)

refractive index of the film

d)

None

24.

Why Newton's rings are circular in shape?

a)

Because of the shape of the lens

b)

since the medium is air

c)

The locus of points of a particular thickness forms a circle

d)

All

25.

Newton's Rings are observed in reflected light of wavelength 5900A. The Diameter of the 10th dark ring is 0.5 cm. Find the radius of curvature of the lens.

a)

0.8 m

b)

1.05 m

c)

1.59 m

d)

0.67 m

QUIZ

Total questions: 25

Worksheet time: 42mins

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