NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1367 - 1369 of 2320

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Question number: 1367

» Properties of Solids & Liquids » Heat Transfer » Radiation

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MCQ▾

Question

A black body is at a temperature of 2550 K. The energy of radiation emitted by this object with wavelength between 499 nm and 500 nm is U 1 between 999 nm and 1000 nm is U 2 and between 1499 nm and 1500 nm is U 3 . The Wein’s constant b = 2.88 × 10 6 nm K. Then

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 1368

» Wave Optics » Young's Double Slit Experiment

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Question

In Young’s double slit experiment, the distance between two slits is made three times then the fringe width will become –

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 1369

» Wave Optics » Polarization

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MCQ▾

Question

Plane polarised light is passed through a polaroid. On viewing through the polaroid we find that when the polaroid is given one complete rotation about the direction of the light, which of the following is not observed?

(1) The intensity of light gradually decreases to zero and remains at zero

(2) The intensity of light gradually increases to a maximum and remains at maximum

(3) There is no change in intensity

(4) The intensity of light is twice maximum and twice zero

Select the correct answers and mark it according to the following codes:

Codes:

Choices

Choice (4)Response

a.

1,2 and 3 are correct

b.

2 and 4 are correct

c.

1 and 3 are correct

d.

1 and 2 are correct

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