Question 21

In Fig., a flower made of thick coloured paper has been pasted on the transparent glass sheet. What will be the shape and colour of shadow seen on the screen?

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Solution

A shadow is formed when an object blocks the path of light. Here, the flower made of thick coloured paper blocks the path of the light and hence dark shadow is formed in the shape of the flower along with the stalk.

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Question 24

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 Fig. Will the shadow be formed in each case? If yes, how will the shadow on the screen be different in each case? Give reasons for your answer.

• Take any magazine or newspaper that has colourful pages.
• Cut out balloons of various sizes and shapes carefully, using a pair of scissors.
• Paste the balloons on a large sheet of paper.
• Arrange them to make a colourful bunch of ballons.
• Draw a string for each balloon in a different colour.

In order to make an efficient solar cooker, the cover of cooker box should be made of :
(a) transparent plastic sheet (b) shining aluminium sheet
(c) butter paper sheet (d) transparent glass sheet

Q. A strip, 2 cm broad, along the sides of a sheet of paper which is 20 cm long and 10 cm broad, has been coloured. What is the area of the coloured part?

Question 12

Correct the following statements.
(i) The colour of the shadow of an object depends on its colour.
(ii) Transparent objects allow light to pass through them partially.

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Shadow Formation

Standard VI Physics

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Question 21 In Fig., a flower made of thick coloured paper has been pasted on the transparent glass sheet. What will be the shape and colour of shadow seen on the screen?

A shadow is formed when an object blocks the path of light. Here, the flower made of thick coloured paper blocks the path of the light and hence dark shadow is formed in the shape of the flower along with the stalk.

Question 21

In Fig., a flower made of thick coloured paper has been pasted on the transparent glass sheet. What will be the shape and colour of shadow seen on the screen?