Multiple choice

Consider the following statements:

  1. An artificial satellite can be tracked very precisely from the earth by using Doppler Effect.
  2. Cosmic rays are also known as TV waves.

Which of the given statements is/are correct?

  1. Only 1

  2. Only 2

  3. Both 1 and 2

  4. Neither 1 nor 2
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Statement (1) is correct. Doppler Effect is the change in frequency of a wave for an observer moving relative to its source. The radio signal received from a moving vehicle will help in tracking an artificial satellite. Statement (2) is incorrect. Radio waves are also called TV waves.

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