Wave Optics (NEST (National Entrance Screening Test) Physics): Questions 2 - 3 of 5

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Question number: 2

» Wave Optics » Brewster's Law

Appeared in Year: 2009

MCQ▾

Question

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

Quadrilateral poly1 Quadrilateral poly1: Polygon A, B, C, DQuadrilateral poly2 Quadrilateral poly2: Polygon D, C, E, FAngle α Angle α: Angle between I, J, HAngle α Angle α: Angle between I, J, HAngle β Angle β: Angle between K, J, HAngle β Angle β: Angle between K, J, HSegment 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.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 3

» Wave Optics » Young's Double Slit Experiment

Appeared in Year: 2015

MCQ▾

Question

In a Young double slit experiment, the distance between the slits is Equation and the distance of the screen from the slits is Equation . An infrared monochromatic light is used to produce an interference pattern with fringe width Equation . If the light source is replaced by an electron source to produce the same fringe width then the speed of the electrons is approximately –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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