Wave Optics-Diffraction Due to a Single Slit Width of Central Maximum (NEET Physics): Questions 10 - 15 of 17

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2098 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: 10

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

MCQ▾

Question

The first diffraction minima due to a single slit diffraction is at θ = 30° for a light of wavelength 5000 Å. The width of the slit is-

Choices

Choice (4) Response

a.

1.0 × 10 -5 cm

b.

1.25 × 10 -5 cm

c.

2.5 × 10 -5 cm

d.

5 × 10 -5 cm

Question number: 11

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

MCQ▾

Question

A diffraction pattern is produced by a single slit of width 0.5mm with the help of a convex lens of focal length 40cm. If the wavelength of light used is 5896A. Then the distance of first dark fringe from the axis will be

Choices

Choice (4) Response

a.

0.047 mm

b.

0.047 m

c.

47 cm

d.

0.047 cm

Passage

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

Angular width of central maximum in the Fraunhoffer-diffraction pattern of a slit is measured. The slit is illuminated by light of wavelength 6000 Å. When, the slit is illuminated by light of another wavelength, the angular width decreases by 30%.

Question number: 12 (1 of 2 Based on Passage) Show Passage

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

MCQ▾

Question

The wavelength of the light is

Choices

Choice (4) Response

a.

5200 Å

b.

5000 Å

c.

4200 Å

d.

3500 Å

Question number: 13 (2 of 2 Based on Passage) Show Passage

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

MCQ▾

Question

The same decrease in the angular width of central maximum is obtained when the original apparatus is immersed in a liquid. Find refractive index of the liquid.

Choices

Choice (4) Response

a.

1.23

b.

1.43

c.

2.43

d.

2.2

Question number: 14

» 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: 15

» 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

f Page
Sign In