MPSC PYQ

MPSC Rajyaseva 2017 CSAT — Question 22

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श्रव्यातीत तरंग असे तरंग आहेत की ते Ultrasonic waves are those waves which

a)(1) मानव ऐकू शकत नाही / human beings cannot hear✓ Correct
b)(2) मानव ऐकू शकतो / human beings can hear
c)(3) त्यांची वारंवारता कमी आहे / have less frequency
d)(4) वरीलपैकी एकही नाही / None of the above

Ultrasonic waves have frequencies above the human hearing range (greater than 20 kHz), hence they cannot be heard by human beings.

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