Match the statements in Column A with those in Column B. Column A Column B 1 . An optical medium which has different composition at different points (a) 3 × 10 8 m / s 2 . A body which does not allow light to pass through it. (b) Ray of light 3 . The speed of light (c) Luminous 4 . The path along which light energy travels in a given direction. (d) Opaque 5 . A body emitting light on its own. (e) Heterogeneous

An optical medium which has different composition at different points - Heterogenous An optical medium which has different composition at different points is called heterogeneous medium. A body which does not allow light to pass through it - opaque Those bodies which do not allow the light energy to pass through them are called opaque bodies. The speed of light - 3×10 8 m/s The speed of light is the distance light can travel in a unit of time through a given substance. The path along which light energy travels in a given direction - Ray of light The path along which light energy travels in a given direction is called a ray of light. A body emitting light on its own - Luminous All bodies which emit light energy by themselves are called luminous bodies. Column A Column B 1 . An optical medium which has different composition at different points (e) Heterogeneous 2 . A body which does not allow light to pass through it. (d) Opaque 3 . The speed of light (a) 3 × 10 8 m / s 4 . The path along which light energy travels in a given direction. (b) Ray of light 5 . A body emitting light on its own. (c) Luminous

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Define the transparent, translucent and opaque objects. Write down the name of these objects seen around you.

Important Questions on Light, Shadows and Reflections

MEDIUM

Science>Physics>Light, Shadows and Reflections>Transparent, Opaque and translucent Objects

Which of the following objects allow light to pass through them?

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Science>Physics>Light, Shadows and Reflections>Transparent, Opaque and translucent Objects

Luminous bodies:

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Science>Physics>Light, Shadows and Reflections>Transparent, Opaque and translucent Objects

Does the flame of gas stove emit light? Explain.

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Science>Physics>Light, Shadows and Reflections>Transparent, Opaque and translucent Objects

List a few examples of opaque objects?

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Science>Physics>Light, Shadows and Reflections>Transparent, Opaque and translucent Objects

Light refracts at the boundary of

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Science>Physics>Light, Shadows and Reflections>Transparent, Opaque and translucent Objects

The sun and stars are examples of _____ (luminous/ non-luminous) objects.

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Science>Physics>Light, Shadows and Reflections>Transparent, Opaque and translucent Objects

Give two examples of non-luminous objects.

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Science>Physics>Light, Shadows and Reflections>Transparent, Opaque and translucent Objects

Suggest two ways of converting transparent plastic sheet into translucent sheet.

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Science>Physics>Light, Shadows and Reflections>Transparent, Opaque and translucent Objects

Objects which emit their own light are known as _____ objects.

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Science>Physics>Light, Shadows and Reflections>Transparent, Opaque and translucent Objects

State one way of making a non-luminous object to emit light.

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Science>Physics>Light, Shadows and Reflections>Transparent, Opaque and translucent Objects

Coloured glass is an example of _____ material.

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Science>Physics>Light, Shadows and Reflections>Transparent, Opaque and translucent Objects

Frosted glass is an example of _____ object.

(Choose from the following: transparent/ translucent)

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Science>Physics>Light, Shadows and Reflections>Transparent, Opaque and translucent Objects

An example of natural source of light is _____.

(Choose from the following: sun/glowing bulb)

MEDIUM

Science>Physics>Light, Shadows and Reflections>Transparent, Opaque and translucent Objects

A table is a transparent object.

MEDIUM

Science>Physics>Light, Shadows and Reflections>Transparent, Opaque and translucent Objects

Match the statements in Column A with those in Column B.

Column A	Column B
$1 .$ An optical medium which has different composition at different points	(a) $3 \times 10^{8} m / s$
$2 .$ A body which does not allow light to pass through it.	(b) Ray of light
$3 .$ The speed of light	(c) Luminous
$4 .$ The path along which light energy travels in a given direction.	(d) Opaque
$5 .$ A body emitting light on its own.	(e) Heterogeneous