chapter 8 waves
The frequency of the second hand on a clock is
1x60 HZ
A mass on the end of a spring bobs up and down 1 complete cycle every 2 s. Its frequency is
2Hz
A wave travels an average distance of 6 m in 1 s. What is the wave's velocity?
6 m/s
he sound coming from one tuning fork can force another to vibrate. What is the analogous effect for light?
A light wave incident upon matter can force some of the electrons in the matter into vibration on the frequency of the incident wave.
What is the result of constructive interference?
A wave of increased amplitude.
How does the average speed of light in glass compare with its speed in a vacuum?
The average speed of light in glass is less than in a vacuum.
How does the frequency of an electromagnetic wave compare with the frequency of the vibrating electrons that produce it?
The frequency of the wave is the same as the frequency of the vibrating electrons that produce it.
What is the definition of forced vibration?
The setting up of vibrations in an object by a vibrating source.
The speed of a sound wave in air depends on
air temperature
What kinds of waves exhibit interference?
all kinds of waves
What causes the bending of light in refraction?
change in waves speed
Define the wavelength of sound in terms of successive compressions of air.
disdtance between two successive compressions.
wavelegnth
distance between crest troughs and identification parts of a wave
In one word, what is it that moves from source to receiver in wave motion?
energy
what is the wave speed formula
frequencyxwavelegnth
If you double the frequency of a vibrating object, its period
is quartered
The angle of incidence equals the angle of reflection.
law of reflection
For an opening of a given size, is diffraction more pronounced for a longer wavelength or a shorter wavelength?
longer wave legnth
sound waves are.....
longitudinal waves
What is the fate of the energy in ultraviolet light incident on glass?
most energy is absorbed from the g.lass
does medium in which wave travels with move with the wave?
no.It travels from one place to another not the medium
frequency
number of vibrations per time
doppler effect
occurs when sound is moving towards you and away from you
In what direction are the vibrations relative to the direction of wave travel in a longitudinal wave?
parallel
the time for a complete cycle to occur
period
What evidence can you cite for the particle nature of light?
photo electric effect
What is the principal difference between a radio wave and light?
radio waves have much lower frequencies
Twenty to twenty-thousand Hertz
range of human hearing
Which of the following is not a transverse wave?
sound
sound travels fastest in
steel
amplitude
the distance frm midpoint to the crest of the wave
For light, a red shift indicates the light source moves
towards you
When the frequency of light matches the natural frequency of molecules in a material, light is
transmitted
true or false infrared waves have longer frequencies than ultraviolet rays
true
Electromagnetic waves consist of
vibrating electric and magnetic fields
the source of all wave motion is.....
vibrating objects
what is the source of all waves
vibrating objects
a wiggle is a
vibration
In what direction are the vibrations relative to the direction of wave travel in a transverse wave?
vibrations are perpendicular towards the ave
When light reflects from a surface, there is a change in its
wavelength frequency and its speed
