NEST (National Entrance Screening Test) Physics: Questions 18 - 19 of 58

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Question number: 18

» Wave Optics » Brewster's Law

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Appeared in Year: 2009

MCQ▾

Question

An unpolarised monochromatic beam of light is incident on a planar interface of two media of refractive index and respectively, at an angle of incidence . It is found that the reflected beam is completely polarised. From this, we can conclude that –

Quadrilateral poly1 Quadrilateral poly1: Polygon A, B, C, D Quadrilateral poly2 Quadrilateral poly2: Polygon D, C, E, F Angle α Angle α: Angle between I, J, H Angle α Angle α: Angle between I, J, H Angle β Angle β: Angle between K, J, H Angle β Angle β: Angle between K, J, H Segment g Segment g: Segment [G, H] Segment h Segment h: Segment [I, J] Segment h Segment h: Segment [I, J] Segment h Segment h: Segment [I, J] Segment i Segment i: Segment [J, K] Segment i Segment i: Segment [J, K] Segment i Segment i: Segment [J, K] I text1 = “I” II text1_1 = “II” II text1_1 = “II” i text1_2 = “i” r text1_3 = “r”

A Beam of Light Incident on Interface of Two Media

In figure an unpolarised monochromatic beam of light is incident on a planar interface of two media.

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 19

» Kinetic Theory of Gases » Mean Free Path

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Appeared in Year: 2013

MCQ▾

Question

Which statement (s) about ideal gases and their constituent molecules at a given temperature is/are correct?

Choices

Choice (4) Response

a.

The mean free path of the molecules increases with decrease in pressure.

b.

The average translational kinetic energy of random motion of the molecules is different for different components in a gaseous mixture.

c.

The interaction between the molecules is negligible.

d.

The coefficient of isobaric volume expansion is the same for all ideal gases.