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Q.

Assertion (A) : Radiation is the speediest mode of heat transfer
Reason (R ): Radiation can be transmitted in vacuum even in curved path.
 

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a

Assertion is true and Reason is false

b

Both Assertion and Reason are true and Reason is not the correct explanation of Assertion

c

Assertion is false and Reason is true

d

Both Assertion and Reason are true and Reason is the correct explanation of Assertion 

answer is C.

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Detailed Solution

The process of radiation does not require any material for transmission of heat. Thermal radiation travels with the velocity of light and hence the fastest mode of the transfer. Thermal radiation is always transmitted in a straight line.

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