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
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
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
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
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
Choices
| Choice (4) | Response | |
|---|---|---|
a. |
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b. |
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c. |
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d. |
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