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What are electromagnetic radiations? Wha...

What are electromagnetic radiations? What is their velocity in vacuum?

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Electromagnetic radiations consist of electric and magnetic fields, oscillating perpendicularly to each other and to the direction of propagation of radiation. Velocity of electromagnetic radiation in vacuum is `3xx10^(8)m*s^(-1)`.
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Knowledge Check

  • What is the velocity of sound in vacuum?

    A
    330m/s
    B
    100 m/s
    C
    1500 m/s
    D
    0

  • What is the velocity of light?

    A
    `3xx20^10 cm//sec`
    B
    `5xx10^20 cm//sec`
    C
    `3xx10^10 cm//sec`
    D
    `5xx100^10 cm//sec`

  • Electromagnetic radiation with maximum wavelength is-

    A
    ultraviolet
    B
    radioactive
    C
    X-ray
    D
    infrared

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