Unit 4 (Chap 5, 7)
Light of which of the following colors is scattered most in the atmosphere?
Blue
T/F: waves that move through air are transverse.
false
When you see a rainbow, you know for sure that
you are between the Sun in one direction and falling rain in the other direction
If v = λf, then how are λ and f related?
λ is inversely proportional to f
T/F: Sound travels faster through cold, denser air than through warm, less dense air.
False
T/F: When you are moving toward a stationary source of a sound, its frequency will appear lower than it actually is.
False
T/F: Ultraviolet light carries more energy than infrared waves.
True
You know that sound waves that move through air must be longitudinal waves since
air molecules are not attached to each other
The wavelength of a sound wave is not related to its
amplitude
Today, light is understood to be adequately explained
both wave and particle behavior
Of the following, the highest index of refraction is found in
diamond
The property of light waves that leads to the phenomenon of color is
frequency
A stationary source emits a sound at a constant frequency. If you run toward the source the frequency you hear will be
higher
The greater the decibel (dB) level of a sound wave, the
louder it is
The Sun appears reddish as it sets because
more of the shorter, bluer wavelengths have been scattered away
Polarized light vibrates
only one plane
In an electromagnetic wave, the electric field is
perpendicular to both the magnetic field and the wave direction.
In a transverse wave, the individual particles of the medium move
perpendicular to the direction of travel.
A luminous object is an object that
produces light
A sound wave that moves through the air is
pulses of increased and decreased air pressure
Light of which of the following colors has the longest wavelength?
red
The bending of a wave at the boundary between two media is called
refraction
Transverse mechanical waves can pass through
solids
Of the following kinds of waves, the ones that cannot travel through a vacuum are
sound waves
The higher the frequency of a sound wave
the higher the pitch
The higher the frequency of a wave,
the shorter its wavelength
The index of refraction for flint glass is 1.5. This means that
the speed of light is slower in this medium than it is in vacuum.
The difference between an echo and a reverberation is
the time interval between the original and reflected sound.
Longitudinal waves with a frequency above 20,000 Hz are
ultrasonic
Interference can be most easily explained in terms of the
wave model of light