Wave Optics-Diffraction Due to a Single Slit Width of Central Maximum (NEET Physics): Questions 1 - 4 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: 1

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

Assertion-Reason▾

Assertion (Ꭺ)

If a plane glass slab is placed on the letters of different colors all the letters appear to be raised up to the same height.

Reason (Ꭱ)

Different colors have different wavelengths.

Choices

Choice (4) Response

a.

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

b.

Ꭺ is false but Ꭱ is true

c.

Ꭺ is true but Ꭱ is false

d.

Both Ꭺ and Ꭱ are false

Question number: 2

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

MCQ▾

Question

In Fresnel diffraction, if the distance between the disc and the screen is decreased, the intensity of central bright spot will

Choices

Choice (4) Response

a.

Increase

b.

Remain constant

c.

decrease

d.

All of the above

Question number: 3

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

MCQ▾

Question

A screen is placed 2 m away from the single narrow slit. Calculate the slit width if the first minimum lies 5 mm on either side of the central maximum. Incident plane waves have a wavelength of 5000 Å.

Choices

Choice (4) Response

a.

2 × 10 -4 cm

b.

2 × 10 -4 m

c.

2 × 10 -3 cm

d.

None of the above

Question number: 4

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

MCQ▾

Question

Two spectral line of sodium D 1 & D 2 have wavelengths of approximately 5890 Å and 5896 Å. A sodium lamp sends incident plane wave on to a slit of width 2 micrometer. A screen is located at 2 m from the slit. Find the spacing between the first maxima of two sodium lines as measured on the screen.

Choices

Choice (4) Response

a.

9 × 10 4 m

b.

10 -4 m

c.

9 × 10 -4

d.

All of the above

Sign In