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UPSC CAPF AC Paper - I
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In each of the following questions, a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements, mark the correct answer as-

Assertion (A): Pieces of paper at the focus of a concave lens would be burnt out, when sunlight is incident on it.

Reason (R): High amount of heat energy is concentrated at the focus after reflection of the light through the mirror.

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Important Questions on Physics

EASY
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 1 - Physics>Assessment>Q 177

In each of the following questions, a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements, mark the correct answer as-

Assertion (A): The ray optics of light is based on wave motion as well as rectilinear motion of light.

Reason (R): Light behaves as the wave as well as the particle.

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HARD
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 1 - Physics>Assessment>Q 178

In each of the following questions, a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements, mark the correct answer as-

Assertion (A): A rainbow is of the seven colours.

Reason (R): Dispersion breaks the light into its constituent colours.

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HARD
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 1 - Physics>Assessment>Q 179

In each of the following questions, a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements, mark the correct answer as-

Assertion (A): A microscope can be used as a resolving apparatus.

Reason (R): The distance object can be resolved when seen through it.

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HARD
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 1 - Physics>Assessment>Q 180

Consider the following statements:

I. Red colour of sun at sunrise and sunset are due to scattering.

II. Plane polarisation of light makes its vibrations in one plane.

III. Diffraction of light is based on its bending round the corners.

IV. If the size of obstacle is negligible in comparison to wavelength of the light the diffraction can be neglected.

Which one of the following statement (s) is/are true?

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UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 1 - Physics>Assessment>Q 181
A point object is placed at a distance 30 cm from a convex mirror of focal length 30 cm. The image will be formed at:
HARD
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 1 - Physics>Assessment>Q 182
Light travels slower in glass than in air because:
MEDIUM
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 1 - Physics>Assessment>Q 183
The blue colour of water in the sea is due to:
MEDIUM
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 1 - Physics>Assessment>Q 184

In each of the following questions, a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements, mark the correct answer as-

Assertion (A): A stick is dipped in water in a starting position. If observed side ways, the stick appears short and bent at the surface of water.

Reason (R): A light coming from the stick under goes scattering from water molecules giving the stick as hard and bent appearance.

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