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Shadow Formation

How does the ...

Question

How does the colour of an opaque object affect the colour of the shadow?

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Solution

Shadow is the dark area behind any opaque object where the light cannot pass through. The colour of an opaque object doesn’t affect the colour of the shadow.

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Q. A student obtains a shadow of an opaque object using a red, and then a green flashlight. The colour of the shadow will be different for each case.

Q. A student covered a torch with red cellophane sheet to obtain red light. Using the red light she obtains a shadow of an opaque object. She repeats this activity with green and blue light. Will the colour of the light affect the shadow? Explain.

State whether true or false.

The shadow formed by a red opaque object is red in colour.

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(a) Dark colour objects absorb and radiate more heat than light coloured objects.
(b) Dark colour objects absorb more but radiate less heat than light coloured objects.
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(d) Dark colour objects absorb and radiate the same amount of heat as light coloured objects.

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