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प्रश्न
Describe the pictures.
उत्तर
- When the tube is bent, we cannot see the source of light
- When the tube is held straight we can see the flame. The two pictures verify that light travels in straight lines. This is known as rectilinear propagation of light.
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संबंधित प्रश्न
Write true or false of the following statement.
The moon is self-luminous.
Write true or false of the following statement.
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Fill in the blank
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_______ is the natural source that stimulates sight and makes things visible.
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State whether true or false. If false, correct the statement.
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Observe the picture given in Fig. 11.1 carefully.
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