Advertisements
Advertisements
प्रश्न
Name the type of waves that are used for sound ranging. Why are radio waves not audible to us?
उत्तर
Radio waves. These waves are not audible to us because their frequency is 3 × 104 Hz to 3 × 109 Hz. Which is more than the audible range.
APPEARS IN
संबंधित प्रश्न
Name the characteristic of sound in relation to its waveform
Displacement distance graph of two sound waves A and B, travelling in a medium, are as shown in the diagram below.
Study the two sound waves and compare their:
1) Amplitudes
2) Wavelengths
State the use of echo by a bat, dolphin and fisherman.
What is a megaphone ? Name the principle on which a megaphone works.
What is a stethoscope ? Name the principle on which a stethoscope works.
Write the approximate value of the speed of sound in air.
How are bats able to fly in the dark?
What is mean by the reflection of sound?
A sound wave whose frequency is 5000 Hz travels in air and then hits the water surface. The ratio of its wavelengths in water and air is ______.
