Wave Optics Test

Result

Wave Optics Test - 34

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Weekly Quiz Competition

Question 1
4 / -1

In a double slit experiment, instead of taking slits of equal widths, one slit is made twice as wide as the other. Then in the interference pattern

A
The intensities of both the maxima and the minima increase

B
The intensity of maxima increases and the minima has zero intensity

C
The intensity of maxima decreases and that of the minima increases

D
The intensity of maxima decreases and the minima has zero intensity

Solution
Question 2
4 / -1

In the Young\'s double slit experiment, for which colour the fringe width is least?

A
Red

B
Green

C
Blue

D
Yellow

Solution
Question 3
4 / -1

In a Young\'s double slit experiment, the separation of the two slits is doubled. To keep the same spacing of fringes, the distance D of the screen from the slits should be made

A

B

C
2D

D
4D

Solution
Question 4
4 / -1

If white light is used in the Newton\'s rings experiment, the colour observed in the reflected light is complementary to that observed in the transmitted light through the same point. This is due to

A
90° change of phase in one of the reflected waves

B
180° change of phase in one of the reflected waves

C
145° change of phase in one of the reflected waves

D
45° change of phase in one of the reflected waves
Question 5
4 / -1

An interference pattern was made by using red light. If the red light changes with blue light, the fringes will become

A
Wider

B
Narrower

C
Fainter

D
Brighter

Solution
Question 6
4 / -1

If a white light is used in Young\'s double slit experiments then a very large number of coloured fringes can be seen

A
With first order violet fringes being closer to the central white fringes

B
First order red fringes being closer to the central white fringes

C
With a central white fringe

D
With a central black fringe
Question 7
4 / -1

In Young\'s double slit experiment, the central bright fringe can be identified

A
By using white light instead of monochromatic light

B
As it is narrower than other bright fringes

C
As it is wider than other bright fringes

D
As if has greater intensity than the other bright fringes
Question 8
4 / -1

In Young\'s double slit experiment, the wavelength of the light used is doubled and distance between two slits is half of initial distance, the resultant fringe width becomes

A
2 times

B
3 times

C
4 times

D
1/2 times

Solution
Question 9
4 / -1

In a Young\'s double slit experiment, the source illuminating the slits is changed from blue to violet. The width of the fringes

A
Increases

B
Decreases

C
Becomes unequal

D
Remains constant

Solution
Question 10
4 / -1

In Young\'s double slit experiment, the intensity of light coming from the first slit is double the intensity from the second slit. The ratio of the maximum intensity to the minimum intensity on the interference fringe pattern observed is

A
34

B
40

C
25

D
38

Solution