Assertion :Short wave bands are used for transmission of radio waves to a large distance. Reason: Short wave are reflected by ionosphere.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Having the range of wavelength from $30 k m$ to $30 c m$ are known as short wave. These are used for radio transmission and for general communication purpose to a longer distance from ionosphere. Ionosphere is the outmost region of atmosphere extending from height of $80 k m$ to $400 k m$ approximately, above the surface of earth. Therefore, both the assertion and reason are true and reason is the correct explanation of assertion.

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