Advertisements
Advertisements
प्रश्न
Which of the following statements are correct?
- Sound is produced by vibrations.
- Sound requires a medium for propagation.
- Light and sound both require a medium for propagation.
- Sound travels slower than light.
विकल्प
i & ii only
i, ii & iii only
ii, iii & iv only
i, ii, iv only
उत्तर
i, ii, iv only
Explanation -
Because light can travel in vacuum also but it is only sound which requires medium to travel.
APPEARS IN
संबंधित प्रश्न
Write true or false for a given statement.
Female voice is shriller than the male voice.
Describe a simple experiment to determine the speed of sound in air. What approximation is made in the method described by you?
An observer X is on an island 5500 m from a vertical cliff on the shore. A ship Y is anchored between the island and the Cliff. A blast on the ship’s siren is heard twice by X, the interval being 5s. [Velocity of sound = 330 ms−1]
(i) Find the distance of the ship from the island.
(i) Find the distance of the cliff from the ship.
Select the correct option:
In the region of compression or rarefaction, in a longitudinal wave, the physical quantity which does not change is:
How do the following factor affect the speed of sound in air?
Moisture in air.
Can you hear each other in a dark room?
The sound waves travel faster ______.
Distinguish between compression and rarefactions.
Give scientific reasons.
In earlier times, people used to listen for the arrival of a distant train by putting their ear to the rail.
