Multiple choice

Consider the following statements:

  1. Doppler principle is observed by both light and sound waves.
  2. Ear pinna receives the sound from external environment.

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
C Correct answer
Explanation

Statement 1 is correct. Doppler principle is the apparent change in frequency (and wavelength) of a wave that is perceived by an observer with respect to the change in the distance between the observer and the source. This principle is observed by both light and sound waves. Statement 2 is also correct. Ear pinna receives the sound from external environment. The pinna captures sounds in the environment and increases the loudness of those pitches that make it easier to understand speech.

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