Advertisements
Advertisements
प्रश्न
Name two sound absorbing materials (or objects) which can make our big room less echoey.
Advertisements
उत्तर
Curtains and carpets are two sound-absorbing materials that can make big rooms less echoey.
APPEARS IN
संबंधित प्रश्न
A wave passes from one medium to another medium. Mention one property of the wave out of speed, frequency or wavelength which changes.
State two differences between the light and sound waves.
The following diagram shows three ways in which the string of an instrument can vibrate.
(a) which of the diagram shows the principal note?
(b) which has the frequency four times that of the first?
(c) what is the ratio of the frequency of the vibration in (i) and (ii)?
What is the shape of a soundboard kept behind the speaker on the stage of a big hall ?
What are mechanical waves?
A cork piece is floating on the surface of the water in a pond. A piece of pebble is dropped into the water. What will be your observation?
Why is an echo not heard when the distance between the source of sound and reflection body is less than 10 m?
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.
The direction of the incident sound, the direction of reflected sound, and the normal are in different Planes.
