Sound vibrations with frequencies greater than 20,000 Hz are called:
Which of the following is an application of the Doppler shift?
Determination of wavelength of sound produced by tuning fork.
Determining the frequency of a tuning fork.
Producing line emission spectra.
Detecting cars moving at high speed on highways.
Which of the following waves CANNOT be polarised?
A horizontal string plucked vertically in the middle
Ultrasonic waves
Ultraviolet radiation
Radio waves
Suppose that a sound source is emitting waves uniformly in all directions. If you move to a point twice as far away from the source, the frequency of the sound will be:
The intensity of a point source at a distance d from the source is I. What is the intensity at a distance 2d from the source?
