A torch is placed at two different positions A and B one by one as shown in figure.The shape of the shadow obtained in two positions is shown in the given figure.
Match the position of the torch and shape of the shadow of the ball.

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(a)

Differentiate between a shadow and an image.

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Differentiate between a luminous and non-luminous objects.

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(a)

Show an experiment which proves that light always travels in a straight line.

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Explain with the help of a diagram that how can we see an image behind wall using a periscope.

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(a)

A student had a ball, a screen and a torch in working condition. He tried to form a shadow of the ball on the screen by placing them at different positions. Sometimes,1he shadow was not obtained. Explain.

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(a)

A sheet of plywood, a piece of muslin cloth and that of a transparent glass, all of the same size and shape were placed at A one by one in the arrangement shown in figure. Will the shadow be formed in each case? If yes, then how will the shadow on the screen be different in each case? Give reasons for your answer.

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A football match is being played at night in a stadium with flood lights ON. You can see the shadow of a football kept at the ground but cannot see its shadow when it is kicked high in the air. Explain.

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(a)

What is a shadow? Explain a simple process for shadow formation.

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(a)

Explain about solar eclipse and lunar eclipse. Also, give the ray diagrams.

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