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Assertion: A narrow pulse of light is se...

Assertion: A narrow pulse of light is sent through a medium. The pulse will retain its shape as it travels through the medium.
Reason: A narrow pulse is made of harmonic waves with a large range of wavelengths.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion

B

If both assertion and reason are true but reason is not the correct explanation of the assertion

C

If assertion is true but reason is false.

D

If the assertion and reason both are false

Text Solution

Verified by Experts

The correct Answer is:
D
A narrow pulse is made of harmonic waves with a large range of wavelength. As speed of propagation is different for different wavelengths, the pulse cannot retain its shape while travelling through the medium.
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