Wave Optics-Young's Double Slit Experiment (NEET Physics): Questions 12 - 16 of 17

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Question number: 12

» Wave Optics » Young's Double Slit Experiment

MCQ▾

Question

In Young’s double slit experiment, the distance between two slits is made three times then the fringe width will become –

Choices

Choice (4) Response
a.

19times

b.

9times

c.

3times

d.

13times

Question number: 13

» Wave Optics » Young's Double Slit Experiment

Assertion-Reason▾

Assertion (Ꭺ)

In Young’s double slit experiment, the fringes become indistinct if one of the slits is covered with cellophane paper.

Reason (Ꭱ)

The cellophane paper decreases the wavelength of light.

Choices

Choice (4) Response
a. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ
b. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ
c. Ꭺ is true but Ꭱ is false
d. Ꭺ is false but Ꭱ is true

Passage

Read the passage given below and answer the questions that follow:

In a Young’s double slit experiment a monochromatic light whose wavelength is λ strikes on the slits, separated by distance d, as shown in the figure. Refractive index of the medium between slits and screen varies with time t as n=n0+kt . Here n 0 and k are positive constants. Position of any point P on screen is measure by its -coordinate as shown.

Young’s double slit experiment

Young’S Double Slit Experiment

In a Young’s double slit experiment a monochromatic light whose wavelength is λ strikes on the slits, separated by distance d, as shown in the figure. Refractive index of the medium between slits and screen varies with time t as n = n0 + kt.

Question number: 14 (1 of 2 Based on Passage) Show Passage

» Wave Optics » Young's Double Slit Experiment

MCQ▾

Question

The y co-ordinate of central maxima at any time t is,

Choices

Choice (4) Response
a.

DcosΦ(n0+kt)2

b.

DcosΦn0+kt

c.

DsinΦ(n0+kt)2

d.

DsinΦn0+kt

Question number: 15 (2 of 2 Based on Passage) Show Passage

» Wave Optics » Young's Double Slit Experiment

MCQ▾

Question

The velocity of central maxima at any time t as a function of time t is

Choices

Choice (4) Response
a.

kDsinΦ(n0+kt)

b.

2kDsinΦ(n0+kt)2

c.

kDsinΦ(n0+kt)2

d.

2kDsinΦ(n0+kt)

Question number: 16

» Wave Optics » Young's Double Slit Experiment

MCQ▾

Question

In a Young’s double slit experiment, the separation between the slits is 0.10 mm, the wavelength of light used is 600 nm and the interference pattern is observed on a screen 1.0 m away. Find the separation between the successive bright fringes.

Choices

Choice (4) Response
a.

6 cm

b.

6.6 mm

c.

6 m

d.

6.0 mm

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