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