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All Emr travel with speed of light...

All Emr travel with speed of light

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Light waves travel with the speed of 3 xx 10^(8) "m s"^(-1) . Express the speed in miles are per hour.

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Knowledge Check

  • Speed of light is

    A
    the same in medium - 1 and medium - 2
    B
    larger in medium - 1 than in medium - 2
    C
    larger in medium - 2 than in medium -1
    D
    different at b and d

  • Which of the following travels with the speed of light ?

    A
    ` alpha`-rays
    B
    `beta`-rays
    C
    `gamma`- rays
    D
    X-rays

  • Assertion (A): X-ray travels with the speed of light. Reason (R): X-ray is an e.m. wave.

    A
    Both A and R are true and R is the correct explanation of A.
    B
    Both A and R are true and R is NOT the correct explanation of A.
    C
    A is true but R is false
    D
    A is false and R is true

    • Similar Questions

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    Which of the following do not travel with the speed of light?

    Assertion :– As light travels from one medium to another, the speed of light change. Reason :– Speed is the characteristic of medium so it will change.

    What is the refractive index of a medium in which light travels with a speed of 2 xx 10^8 m//s ?

    What is the refractive index of a medium in which light travels with a speed of 2 xx 10^(8)m//s ?

    If an electron travels with a velocity of 1/100th speed of light in the first in the first Bohr orbit, what is its velocity (relative to the speed of light) in the 5th Bohr orbit ?

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