Advertisements
Advertisements
Question
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.
Options
i & ii only
i, ii & iii only
ii, iii & iv only
i, ii & iv only
Advertisements
Solution
i, ii & iv only
Explanation:
Because light can travel in vacuum also but it is only sound that requires a medium to travel.
APPEARS IN
RELATED QUESTIONS
Which characteristics of the sound helps you to identify your friend by his voice while sitting with others in a dark room?
Write true or false for a given statement.
Female voice is shriller than the male voice.
What is the difference between a compression and a rarefaction in a sound wave? Illustrate your answer with a sketch.
Explain meaning of the terms compression and rarefaction in relation to a longitudinal wave.
Arrange the speed of sound in gases Vg, solids Vs and liquids VLin an ascending order.
The sound of an explosion on the surface of a lake is heard by a boat man 100 m away and by a diver 100 m below the point of explosion.
(i) Who would hear the sound first: boatman or diver?
(ii) Give a reason for your answer in part (i).
(iii) If sound takes time t to reach the boatman, how much time approximately does it take to reach the diver?
How do the following factor affect the speed of sound in air?
Pressure in air.
How does the sound produced by a vibrating object in a medium reach your ears?
Sound can travel through solids, gases, liquids, and even vacuum.
A key of a mechanical piano struck gently and then struck again but much harder this time. In the second case
