Wave Optics (NEET Physics): Questions 48 - 52 of 63

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2099 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 550.00 or

Question number: 48

» Wave Optics » Polarization

MCQ▾

Question

When an unpolarised light of intensity I 0 is incident on a polarizing sheet, the intensity of the light which does not get transmitted is

Choices

Choice (4) Response
a.

Zero.

b.

14I0

c.

I0

d.

12I0

Question number: 49

» Wave Optics » Interference

MCQ▾

Question

Two coherent sources of intensity ratio 1: 4 produce an interference pattern. The fringe visibility will be –

Choices

Choice (4) Response
a.

1

b.

0.6

c.

0.4

d.

0.8

Question number: 50

» Wave Optics » Diffraction Due to a Single Slit Width of Central Maximum

MCQ▾

Question

In Fresnel’s biprism experiment the width of 10 fringes is 2cm which are formed at a distance of 2 meter from the slit. If the wavelength of light is 5100 Å then the distance between two coherent sources will be,

Choices

Choice (4) Response
a.

5.1 ×10 -4 mm

b.

5.1 ×10 -4 m

c.

5.1 ×10 -4 cm

d.

10.1 ×10 -4 cm

Question number: 51

» Wave Optics » Diffraction Due to a Single Slit Width of Central Maximum

MCQ▾

Question

Fraunhoffer diffraction pattern is observed at a distance of 2m on screen, when a plane-wavefront of 6000A is incident perpendicularly on 0.2 mm wide slit. Width of central maxima is:

Choices

Choice (4) Response
a.

12 mm

b.

6 mm

c.

10 mm

d. None of the above

Question number: 52

» Wave Optics » Huygens' Principle

Assertion-Reason▾

Assertion (Ꭺ)

No interference pattern is detected when two coherent sources are infinitely close to each other.

Reason (Ꭱ)

The fringe width is directly proportional to the distance between the two slits.

Choices

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

Sign In