Class 10 Light Reflection And Refraction MCQ

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Under which of the following conditions a concave mirror can form an image larger than the actual object?

3 points

When the object is kept at a distance equal to its radius of curvature

When object is kept at a distance less than its focal length

When object is placed between the focus and centre of curvature

When object is kept at a distance greater than its radius of curvature

Clear selection

Which of the following statements is true?

3 points

A convex lens has 4 dioptre power having a focal length 0.25 m

A convex lens has -4 dioptre power having a focal length 0.25 m

A concave lens has 4 dioptre power having a focal length 0.25 m

A concave lens has -4 dioptre power having a focal length 0.25 m.

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A full length image of a distant tall building can definitely be seen by using

3 points

a concave mirror

a convex mirror

a plane mirror

both concave as well as plane mirror

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In torches, search lights and headlights of vehicles the bulb is placed

3 points

between the pole and the focus of the reflector

very near to the focus of the reflector

between the focus and centre of curvature of the reflector

at the centre of curvature of the reflector

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The laws of reflection hold good for(a) plane mirror only(b) concave mirror only(c) convex mirror only(d) all mirrors irrespective of their shape

3 points

plane mirror only

concave mirror only

convex mirror only

all mirrors irrespective of their shape

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You are given water, mustard oil, glycerine and kerosene. In which of these media a ray of light incident obliquely at same angle would bend the most?

3 points

Kerosene

water

Mustard oil

Glycerine

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In which of the following, the image of an object placed at infinity will be highly diminished and point sized?(a) Concave mirror only(b) Convex mirror only(c) Convex lens only(d) Concave mirror, convex mirror, concave lens and convex lens

3 points

Concave mirror only

Convex mirror only

Convex lens only

Concave mirror, convex mirror, concave lens and convex lens

Clear selection

Light travel fastest in(a) Water(b) Air(c) Glass(d) Diamond

3 points

water

air

glass

diamond

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