What type of wave are sound waves?
Longitudinal
Transverse
Electromagnetic
A sound wave travels through air towards a steel door. What will happen to the sound wave when it reaches the door?
It will be mainly refracted
It will be mainly reflected
It will be mainly absorbed
What is the name given to the change in speed and direction when a visible light ray travels from air into a glass prism?
Reflection
Refraction
Transmission
Which of the following does not change when a sound wave moves from cold air into warm air?
The frequency of the waves
The wavelength of the waves
The wave velocity of the waves
What is the law of reflection?
Angle of incidence = angle of reflection
Angle of incidence \(\ \textless \\) angle of reflection
Angle of incidence \(\ \textgreater \\) angle of reflection
Why is sound unable to travel through a vacuum?
The sound waves are absorbed by the vacuum
There is nobody there to hear the sound wave
There are no particles present
A light ray passes from air into water at an angle of 30°. Which of these angles is likely to be the angle of refraction?
30°
22°
38°
What is the range of normal human hearing?
2 Hz to 2,000 Hz
20 Hz to 2,000 Hz
20 Hz to 20,000 Hz
A sound wave passes from one medium into another. The wavelength of the waves decreases by a factor 1.5. By what factor will the wave velocity (speed) change?
The wave velocity will decrease by a factor of 1.5
The wave velocity will not change
The wave velocity will increase by a factor of 1.5
Why does the ear only hear sound frequencies between 20 Hz and 20,000 Hz? - Higher
Because the ear canal is too small to receive other frequencies
Because the hairs in the cochlea have lengths that will only respond to this frequency range
Because the pinna is the wrong size to allow other frequencies into the ear