NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1368 - 1370 of 2184

Access detailed explanations (illustrated with images and videos) to 2184 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. Subscription can be renewed yearly absolutely FREE! View Sample Explanation or View Features.

Rs. 550.00 or

How to register?

Question number: 1368

» Wave Optics » Young's Double Slit Experiment

Edit
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.

b.

c.

d.

Question number: 1369

» Wave Optics » Polarization

Edit
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.

1,2 and 3 are correct

b.

2 and 4 are correct

c.

1 and 3 are correct

d.

1 and 2 are correct

Question number: 1370

» Wave Optics » Young's Double Slit Experiment

Edit
Assertion-Reason▾

Question

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.

Ꭺ is false but Ꭱ is true

b.

Ꭺ is true but Ꭱ is false

c.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

d.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ