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प्रश्न
Describe a simple method to find the depth of a submerged ship.
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उत्तर
A ship sends ultrasonic waves downward in the ocean. When the sound waves reaches the ocean floor , they are reflected back to the ship . The time it takes for the signal to return is used to calculate the depth of submerged ship in the ocean.
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संबंधित प्रश्न
Complete the following sentence:
Ultrasound is of frequency ___________.
Complete the following sentence:
Infrasonic sound is of frequency ______________.
Complete the following sentence:
Elephants produce ____________sound.
Name the sound of the frequency given below:
10 Hz
Name the sound of the frequency given below:
100 Hz
Sonar makes use of :
What do you understand by the term sonic vibrations? State the range of sonic vibrations for the human ear.
What do you understand by the term ultrasonic vibrations?
Name three animals which can hear ultrasonic vibrations.
Ultraviolet radiation has a wavelength of 300Å. If the velocity of the electromagnetic wave is 3 × 108 ms-1. Calculate:
- frequency
- time period.
