The frequency of a wave travelling at a speed of 500 m/s is 25Hz. What is its time period?
20 s
0.05 s
25 s
0.04 s
What are the units of frequency?
Cycles per second or Hertz
Meters per second or Hertz
Cycles per meter or Avis
Meters per second or Avis
What does the height of a water wave represent?
Wavelength
Amplitude
Velocity
Frequency
What happens to the speed of the light in glass?
It becomes the speed of sound
It goes faster than in air
It goes slower than in air.
Light does not travel through glass
What is the minimum distance between the source and the reflector so that an echo is heard?
10m
17m
34m
50m
Which of the following will remain unchanged when a sound wave travels in air or in water?
Wavelength and frequency
Speed and frequency
A sound wave is a mechanical wave, not an electromagnetic wave. Why?
Particles of the medium move perpendicular to the direction of energy transport.
A sound wave transports its energy through a vacuum.
Particles of the medium regularly and repeatedly oscillate about their rest position.
A medium is required in order for sound waves to transport energy
What do the air particles , when the sound travels through air?
Vibrate along the direction of wave propagation
Vibrate but not in any fixed direction
Vibrate perpendicular to the direction of wave propagation
Do not vibrate
The study of waves applies to what other subject?
Lightning
Chemistry
Sound
Mathematics
In which direction will the particles move, If a transverse wave is a transporting energy from east to west?
East to west only
Both eastward and westward
North to south only
Both northward and southward
