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प्रश्न
Sonar makes use of :
विकल्प
infrasonic sound
ultrasound
ordinary sound
light
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उत्तर
Sonar makes use of : ultrasound
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संबंधित प्रश्न
A microphone is connected to the Y-input of a C.R.O Three different sounds are made in turn in front of the microphone. Their traces (a), (b) and (c) produces on the screen are shown in following figure.
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| (a) | (b) | (c) |
- Which trace is due to the loudest sound? Give reason for your answer.
- Which trace is due for the sound with the lowest pitch? Explain your answer.
Complete the following sentence:
Infrasonic sound is of frequency ______________.
Name the sound of the frequency given below:
10 Hz
Name the sound of the frequency given below:
100 Hz
A man can hear the sound of frequency :
An electromagnetic wave has a time period of 4 × 10-8 s. Calculate its frequency in MHz.
Ultraviolet radiation has a wavelength of 300Å. If the velocity of the electromagnetic wave is 3 × 108 ms-1. Calculate:
- frequency
- time period.
What are ultrasonic? State and explain two applications of ultrasounds.
Is the energy carried by the ultrasound very high or very low?
What does SONAR stand for? Where do we make use of SONAR?
