The radius of a wavefront as the waves propagate

decreases

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increases

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becomes zero

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sometimes decreases and sometimes increases.

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Solution

The correct option is B increases
As the waves propagates, it goes on creating secondary sources of light, resulting in increase in its radius.

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The radius of a wavefront as the waves propagate

The correct option is B increasesAs the waves propagates, it goes on creating secondary sources of light, resulting in increase in its radius.

The correct option is B increases
As the waves propagates, it goes on creating secondary sources of light, resulting in increase in its radius.