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Assertion (A) : Kerosene having higher r...

Assertion (A) : Kerosene having higher refractive index is optically denser than water, although its mass density is less than that of water.
Reason (R) : The speed of light decides whether a medium is optically rarer or optically denser. As optically denser medium may not possess greater mass density.

A

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).

B

Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A)

C

Assertion (A) is true, but Reason (R) is false.

D

Assertion (A) is false, but Reason (R)is true.

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Knowledge Check

  • When a light ray passes from an optically denser medium into an optically rarer medium,

    A
    its velocity increases
    B
    frequency requency remains same
    C
    wavelength increases
    D
    All the above

  • The ray of light travelling from an optically denser medium to optically rarer medium bends

    A
    towards the normal
    B
    along the normal.
    C
    away from the normal
    D
    by reversing its path.

  • When light travels from an optically rarer medium to an optically denser medium, the velocity decreases because of change in

    A
    wavelength
    B
    frequency
    C
    amplitude
    D
    phase

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