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10 Question-Answer on polarization of light | Learn Physics

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10 Question-Answer on polarization of light

10 Question-Answer on polarization of light

1.       which of the following phenomena is not  common to sound and light waves

(a)    interference

(b)   diffraction

(c)    coherence

(d)   polarization

Ans: (d)

2.       out of the following statements, which is not correct

(a)    when unpolarised  light passes through a Nicol’s prism, the emergent light is elliptically polarized.

(b)   Nicol’s prism works on the principal of double refraction and total internal reflection.

(c)    Nicol’s prism can be used both, to produce and analyze polarized light

(d)   Calcite and Quartz are both, doubly refraction crystals

3.       Light waves can be polarized, because they

(a)    Have high frequencies

(b)   Have short wavelength

(c)    Are transverse

(d)   Can be reflected.

Ans: (c)

4.       A calcite crystal is placed over a dot on a piece of paper and rotated. On viewing through calcite, one will see

(a)    A single dot

(b)   Two stationary dots

(c)    Two rotating dots

(d)   One dot rotating about the other

Ans: (d)

5.       Light transmitted by Nicol prism is:

(a)    Unpolarised

(b)   Plane polarized

(c)    Circularly polarized

(d)   Elliptically polarized

Ans: (b)

6.       From brewster’s law of polarization, it follows that the angle of polarization depends upon

(a)    The wavelength of light

(b)   Plane of polarization’s orientation

(c)    Plane of vibration’s orientation

(d)   None of the above.

Ans: (a)

7.       Polaroid glass is used in sun  glasses because

(a)    It reduces the light intensity to half on account of polarization

(b)   It is fashionable

(c)    It has good colour

(d)   It is cheapter.

Ans: (a)

8.       One of the devices to produce plane polarized light is:

(a)    Nicol prism

(b)   A mirror

(c)    A biprism

(d)   A half wave plate.

Ans: (a)

9.       Ordinary light is:

(a)    Plane polarized

(b)   Circularly polarized

(c)    Elliptically polarized

(d)   Unpolarised.

Ans: (d)

10.       Which one of the following waves cannot be polarized

(a)    Radio waves

(b)   X-rays

(c)    Visible light

(d)   Sound waves.

Ans: (d)


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