Echo of Sound MCQs Quiz Online PDF Download eBook
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MCQs on Echo of Sound PDF Download eBook
MCQ: To communicate with each other, Elephants use
- low frequency sound waves
- low frequency light waves
- high frequency sound waves
- low frequency heat waves
A
MCQ: When sound is incident on the surface of a medium it bounces back into the first medium. The phenomenon is called
- refraction of sound
- deflection of sound
- defraction of sound
- reflection of sound
D
MCQ: The total distance covered by the sound from the point of generation to the reflecting surface and back should be at least
- 30 m
- 34 m
- 40 m
- 38 m
B
MCQ: For hearing distinct echoes, the minimum distance of the obstacle from the source of sound must be
- double to this distance
- equal to this distance
- half of this distance
- one third to this distance
C
MCQ: Echoes may be heard more than once due to successive or multiple reflections
- deflections
- defraction
- refractions
- reflections
D