Advertisements
Advertisements
Question
The sound waves are reflected from an obstacle into the same medium from which they were incident. Which of the following changes?
Options
speed
frequency
wavelength
none of these
Advertisements
Solution
none of these
Hint:
If there is the same medium of a reflected obstacle is used, there is no change in speed, frequency, and wavelength of the sound.
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.
A sound is a form of energy.
Name the two characteristics of sound which differentiate two sounds from each other.
Fig. shows three ways in which a string of length l in an instrument can vibrate.
 |
 |
 |
| (i) | (ii) | (iii) |
- Which of the diagram shows the principle note?
- Which vibration has the frequency four times that of the first?
- Which vibration is of the longest wavelength?
- What is the ratio of the frequency of the vibration in (i) and (ii)?
Define the term wave velocity. Write its S.I. unit.
Answer the following question :
Can sound travel in vacuum?
The distance between one crest and one trough of a sea wave is 4.5 m. If the waves are produced at the rate of 240/min, calculate the time period.
Can you hear each other in a dark room?
Name three animals, which can hear ultrasonic vibrations.
Assertion: The sound of thunder is heard a little later than the flash of light.
Reason: The speed of sound is much less than the speed of light.
