Light waves
Which waves have the longest wavelengths in the electromagnetic spectrum?
Radio waves
The speed of light is fastest when it travels through.......
Gas
What is amplitude?
The amplitude of a wave is the maximum displacement of the medium from it's rest.
Sound energy is energy that moves in waves through matter from a still object.
False: Sound is engergy that moves in waves through matter from a vibrating object. (pg 311, Natural Notes)
Light travels faster than sound.
True (pg 327, bottom)
What do we call the little packets that compose light when light behaves like a particle?
photons
How much faster is the speed of light compared to the speed of sound?
300,000,000 m/s vs. 340m/s
What is a wavelength?
Wavelength is the distance between a point on one cycle of the wave and the same point on the next cycle.
What kind of waves does sound travel by?
longitudinal waves
Oscillate means to travel in one direction.
False. Sound energy causes air to oscillate or vibrate back and forth. (like the air that blew out the candle.
Which waves have the shortest wavelengths in the electromagnetic spectrum?
Gamma Rays
What does the speed of sound depend on that the speed of light does not?q
The speed of sound depends on the temperature, whereas the speed of light does not.
What is the equation for wave speed?
speed = wavelength x frequency
Sound intensity depends on what part of the wave?
Sound intensity depends on the waves amplitude.
The more energy a wave has, the greater it is amplified.
True
The Law of reflection is......
The angle of reflection equals the angle of incidence.
When unpolarized light passes through a horizontal polarizing filter, what happens to it?
"only horizontally polarized light will exit the other side of the filter"
What is the frequency of a wave?
Frequency is the humber of complete cycles in a given time.
What is the equation for the speed of sound in air?
v = (331.5 + 0.6 x T) m/s.
The wavelength and the frequncy are proportional to one another.
False: wavelength and frequency are inversely proportionals to onthe another (when one gets large the other gets small)
Explain why the inside of a black car feels hotter than the inside of a white car?
Because black absorbs all the wavelengths of light while a white car reflects all the wavelengths. Thus the absorbed light energy causes the inside of the black car to feel hotter.
Define Interference
Interference is defined as the interaction of waves with other waves.
_____ and wavelength are related to one another through the speed of the wave.
frequency
What are the four properties that describe waves?
speed, wavelenth, frequecy and amplitude
Another name for a reflective wave is a copied wave.
False: Another name for a reflective wave is an echo.