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 Light ray strikes a transparent glass slab having a refractive index of 1.62. If the reflected and refracted rays are perpendicular to each other, the angle of incidence is

a) 45°

b) 50° 19′

c) 58° 19′

d) 60°

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For a glass slab whose critical angle is 45°, the corresponding polarizing angle is

a) 45°

b) 35° 15′

c) 54° 45′

d) 68° 15′

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A Light ray travelling in air is incident on a glass block in such a way that the reflected ray becomes completely plane-polarized. The refracted ray deviates by 20° from its original direction in air. The refractive index of the glass is

a) 1.329

b) 4.429

c) 1.429

d) 1.6

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Polyvinyl Alcohol, when stretched strongly and treated with iodine, is known as

a) H-Polaroid

b) K-Polaroid

c) C-Polaroid

d) E-Polaroid

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Which of the following substances can be used in the preparation of polaroids?

a) Quartz

b) Calcite

c) Tourmaline

d) Quinine iodosulphate

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Light undergoes maximum polarization on reflection from a glass surface when the angle of incidence is

a) 37°

b) 67°

c) 53°

d) 57°

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Which statement correctly describes polarization produced by reflection?

a) The reflected Light is plane polarized in the plane of incidence

b) The extent of polarization is independent of the angle of incidence

c) Maximum polarization of reflected Light occurs at any angle of incidence

d) The reflected Light is plane polarized perpendicular to the plane of incidence

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When unpolarized Light is incident on a glass surface at the polarizing angle of 57°, then

a) both reflected and transmitted rays are completely polarized

b) the reflected ray is completely polarized while the transmitted ray is partially polarized

c) the reflected ray is partially polarized while the transmitted ray is completely polarized

d) both reflected and transmitted rays are partially polarized

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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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