ICSE /Class 10
Physics MCQ Based On Reflection of sound waves echoes
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ICSE Class 10 Physics Reflection of sound waves echoes
V=(total distance )/(time taken)=(2×75)/0.5=300m/s
Mechanical waves are those waves which needs medium to propagate.
The minimum distance between the source and the reflector in air, to hear an echo, is 17 m.
330/20=16.5m, 330/20000=16.5 ×〖10〗^(-3) m=16.5mm
Since distance is same so V_air t_air=t_water⇒t_water=(V_air t_air)/V_water =1/2×4=2s
To detect obstacles in their path, bats produce Ultrasonic waves.
RADAR stands for “Radio detection and ranging”.
Longitudinal wave are waves in which direction of wave is parallel to the direction of vibration of particle of the medium.
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