Advertisements
Advertisements
प्रश्न
Name the type of waves that are used for sound ranging. Why are radio waves not audible to us?
Advertisements
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.
संबंधित प्रश्न
How is the frequency of a stretched string related it’s tension?
Define wavelength term in relation to a wave.
What is the condition necessary for an echo to be heard distinctly?
State the use of echo by a bat, dolphin and fisherman.
How do bats avoid obstacles in their way, when in flight?
State two factors on which the natural frequency of a body depends.
Waves produced on the surface of the water are formed to move with a velocity of 24 ms−1. If the wavelength of these waves equals 20 cm. find the
(i) frequency (no. of waves produced per second)
(ii) the time period (i.e. the time required to produce one wave) for these waves.
What is meant by an echo? Explain.
The direction of the incident sound, the direction of reflected sound, and the normal are in different Planes.
