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A : infrared waves are often called heat...

A : infrared waves are often called heat waves.
R : Infrared waves vibrate not only the electrons, but entire atoms or molecules of a substance which increases the internal energy and temperature of the substance.

A

If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)

B

If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)

C

If assertion is true statement but Reason is false, then mark (3)

D

If both Assertion and Reason are false statements, then mark (4)

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • STATEMENT-1 : Infra-red waves are caleld heat-waves. STATEMENT-2 : Infra-red waves cause the vibration of not only electrons, but entiie or moelcules of a substance.

    A
    Statement-1 is True, Statement-2 is True-2 is True , Statement-2 is a correct explanation for Statement-5
    B
    Statement-1 is True, Statement-2 is True-2 is NOT a correct explanation for Statement-5
    C
    Statement-1 is True Statement-2 is False
    D
    Statement-1 is False, Statement-2 is True

  • The energy of infrared waves is greater than that of

    A
    visible light
    B
    ultraviolet waves
    C
    X-rays
    D
    microwaves

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    Heat energy can be supplied to a substance without increasing its temperature.

    Wave function of electron in atoms and molecutes are called …………..

    Name the energy which arises due to motion of atoms or molecules in a body. How is this energy affected when the temperature is increased ?

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