9th Class Physics Textbook Malayalam Medium

9th Class Physics Textbook Malayalam Medium. We covered all the 9th Class Physics Textbook Malayalam Medium in this post for free so that you can practice well for the exam.

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9th Class Physics MCQs for Students

A ray of light falls on a transparent glass slab with a refractive index of 1.62. If the reflected ray and refracted ray are mutually perpendicular then the angle of incidence is

(A) 45°

(B) 50° 19'

(C) 58° 19'

(D) 60°

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What is the polarizing angle for a slab of glass for which the critical angle is 45°?

(A) 45°

(B) 35° 15'

(C) 54° 45'

(D) 68° 15'

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A ray of light in the air is incident on a glass block such that the reflected ray is completely polarised. The refracted beam in a medium suffers a deviation of 20° from its original path in the air. The refractive index of the material of medium :

(A) 1.329

(B) 4.429

(C) 1.429

(D) 1.6

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When polyvinyl alcohol is subjected to large strain and impregnated with iodine then it is known as

(A) H-Polaroid

(B) K-Polaroid

(C) C- Polaroid

(D) E- Polaroid

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Which of the following material may be used for manufacturing polaroids?

(A) Quartz

(B) Calcite

(C) Tourmaline

(D) Quinine iodosulphate

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Light is polarised to the maximum when it is incident on a glass surface at an angle of incidence :

(A) 37°

(B) 67°

(C) 53°

(D) 57°

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Which of the polarization of the following reference by reflection?

(A) the reflected light is plane polarised in the plane of incidence

(B) the degree of polarization varies with the angle of incidence

(C) a percentage of the polarizing light in the reflected beam is the greatest at the angle of polarization

(D) the reflected light is plane polarised in the plane perpendicular to the plane of incidence

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A ray of unpolarised light is incident on a glass plate at the polarizing angle of 57° then :

(A) the reflected ray and transmitted rays both will be completely polarised

(B) the reflected ray will be completely polarised and the transmitted ray will be partially polarised

(C) the reflected ray will be partially polarised and the transmitted ray will be completely polarised

(D) the reflected and transmitted rays both will be partially polarised

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We covered all the 9th class physics textbook malayalam medium above in this post for free so that you can practice well for the exam.

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