Home
Class 12
PHYSICS
Assertion: The electromagnetic waves of ...

Assertion: The electromagnetic waves of shorter wavelength can travel longer distances on earth's surface thane those of longer of longer wavelengths.
Reason: Shorter the wavelength, the larger is the velocity of wave propagation. Also, shorter the wavelength, shorter is the velocity of wave propagation.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If assertion and reason both are false.

Text Solution

Verified by Experts

The correct Answer is:
C

The electromagnetic waves of shorter wavelength do not suffer much diffraction from the obstacles of earth's atmosphere so they can travel long distance. Also, shorter the wavelength, shorter is the velocity of wave propagation.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • ELECTROMAGNETIC WAVES AND COMMUNICATION SYSTEM

    A2Z|Exercise AIPMT/NEET Questions|18 Videos
  • ELECTROMAGNETIC WAVES AND COMMUNICATION SYSTEM

    A2Z|Exercise Section D - Chapter End Test|30 Videos
  • ELECTROMAGNETIC WAVES AND COMMUNICATION SYSTEM

    A2Z|Exercise Problems Based On Mixed Concepts|39 Videos
  • ELECTROMAGNETIC INDUCTION

    A2Z|Exercise Section D - Chapter End Test|30 Videos
  • GEOMETRICAL OPTICS

    A2Z|Exercise Section D - Chapter End Test|30 Videos

Similar Questions

Explore conceptually related problems

Answer true or false Velocity of wave propagation = frequency xx wavelength.

Velocity of wave propagation is the product of its wavelength and time period.

Knowledge Check

  • Assertion: The electromagnetic waves of all wavelengths can be polarised. Reaseon : Polarisationo is independent of the wavelegths of electromagnetic waves.

    A
    Assertion is True, Reason is True, Reason is a correct explanation for Assertion
    B
    Assertion is True, Reason is True, Reason is not a correct explanation for Assertion
    C
    Assertion is True, Reasonis False
    D
    Assertion is False, Reason is True
  • The relation between frequency n , wavelength lambda , and velocity of propagation v of wave is

    A
    `n=vlambda`
    B
    `n=(lambda//v)`
    C
    `n=(v//lambda)`
    D
    None of these
  • Assertion : The electromagnetic waves are transverse in nature. Reason : Waves of wavelength 10 μm are radiowave and microwave.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false.
  • Similar Questions

    Explore conceptually related problems

    The relation between frequency n wavelength lambda and velocity of propagation v of wave is

    An observer standing near the sea-coast counts 48 waves per min. If the wavelength of the wave is 10 m, the velocity of the waves will be

    Assertion (A): Bluish colour predominates in a clear sky. Reason ( R): Light of shorter wavelengths is scattered much more than light of longer wavelengths.

    If the frequency of a wave is 330 Hz, and velocity of wave in air is 330 m s^(-1) , then, the wavelength of the wave is

    Assertion (A): Gamma rays are electromagnetic waves having the smallest wavelength. Reason (R): Gamma rays are having the lowest frequency.