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प्रश्न
The frequency is measured in second.
विकल्प
True
False
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उत्तर
False.
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संबंधित प्रश्न
An enemy plane is at a distance of 300 km from a radar. In how much time the radar will be able to detect the plane? Take velocity of radio waves as 3 × 108 ms−1.
State two conditions for an echo to take place.
Explain the mechanism of the formation of a longitudinal wave when the source vibrates in the air.
How does the two sounds of same loudness and same pitch produced by different instruments differ? Draw diagrams to illustrate your answer.
A man playing a flute is able to produce notes of different frequencies. If he closes the holes near his mouth, will the pitch of the note produced, increase or decrease? Give a reason.
It is observed that during march-past we hear a base drum distinctly from a distance compared to the side drums.
(i) Name the characteristics of sound associated with the above obervation.
(ii) Give a reason for the above observation.
Name the subjective property of light related to its wavelength.
Draw a diagram to show the waveforms of a pure note and a musical note, of the same pitch and same loudness.
Give a scientific reason.
In earlier times, people used to listen for the arrival of a distant train by putting their ear to the rail.
