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प्रश्न
Give a scientific reason.
If you were both on the moon, your friend will not be able to hear you call.
उत्तर
We know that sound cannot travel through a vacuum. Since there is no atmosphere on the moon, we cannot hear sound on the moon.
संबंधित प्रश्न
What are infrasonics? Can you hear them?
In an experiment, Anhad studies sound waves. He sets up a loudspeaker to produce sound as shown below :
Anhad adjusts the signal to the loudspeaker to give a sound of frequency 200 Hz.
(a) What happens to the air in-between Anhad and the loudspeaker ?
(b) Explain how Anhad receives sound in both ears.
Complete the following sentences :
Wave velocity = ________________ × wavelength.
A source of wave produces 40 crests and 40 troughs in 0.4 s. What is the frequency of the wave?
What is the ratio of speed of light to speed of sound?
What type of sound is produced by elephants and whales?
High-frequency sounds that cannot be heard by you are called _______.
