NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1354 - 1357 of 2320

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Question number: 1354

» Wave Optics » Young's Double Slit Experiment

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MCQ▾

Question

In Young’s double slit experiment, carried out with light of wavelength λ = 5000 Å, the distance between the slits is 0.2 mm and the screen is at 200 cm from the slits, The central maximum is at x = 0. The third maximum will be at

Choices

Choice (4)Response

a.

1.67 cm

b.

0.5 cm

c.

5.0 cm

d.

1.5 cm

Question number: 1355

» Wave Optics » Polarization

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Question

V 0 and V E represent the velocities, µ 0 and μ E the refractive indices of ordinary and extraordinary rays for a doubly refracting crystal. Then

Choices

Choice (4)Response

a.

if the crystal is calcite

b.

if the crystal is quartz

c.

if the crystal is quartz

d.

if the crystal is calcite

Question number: 1356

» Properties of Solids & Liquids » Elastic Behavior

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Question

A uniform steel wire of density 7500 kg/m 3 is 2.5 m long and weighs 15.6 x 10 -3 kg. It extends by 1.25 mm when loaded by 10 kg. Calculate the value of young’s modulus of elasticity for steel.

Choices

Choice (4)Response

a.

2.3 × 10 11 N/m 2

b.

19.6 × 10 11 N/m 2

c.

2.96 × 10 11 N/m 2

d.

Question does not provide sufficient data or is vague

Question number: 1357

» Wave Optics » Wavefront

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MCQ▾

Question

In the given diagram, CP represents a wavefront and AO & BP, the corresponding two rays. Find the condition on θ for constructive interference at P between the ray BP and reflected ray OP

Wavefront diagram with CP as wavefront

Wavefront Diagram with CP as Wavefront

Choices

Choice (4)Response

a.

b.

c.

d.

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