NEET Physics: Questions 1367 - 1369 of 2098

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Question number: 1367

» 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: 1368

» Wave Optics » Polarization

MCQ▾

Question

Plane polarised light is passed through a polaroid. On viewing through the polaroid we find that when the polaroid is given one complete rotation about the direction of the light, which of the following is not observed?

(1) The intensity of light gradually decreases to zero and remains at zero

(2) The intensity of light gradually increases to a maximum and remains at maximum

(3) There is no change in intensity

(4) The intensity of light is twice maximum and twice zero

Select the correct answers and mark it according to the following codes:

Codes:

Choices

Choice (4) Response

a.

2 and 4 are correct

b.

1, 2 and 3 are correct

c.

1 and 3 are correct

d.

1 and 2 are correct

Question number: 1369

» 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

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