waves Flashcards
Which of the following will sound not travel through
- air in bruner
- water in lake
- the space between the Earth and the Moon
- the space between the Earth and the Moon
In a longitudinal wave, in what direction are the vibrations relative to the direction of wave travel?
back and forth in the same direction
When a source of sound approaches you, you detect an increase in its..
- speed
- frequency
- wavelength
frequency
Which of the following does not belong in the same group?
- water waves
- TV waves
- light waves
- microwaves
water waves
If the sky preferentially scattered red light, a sun set would appear..
blue-purple
Consider dipping your fingers repeatedly into water and making waves. If you dip your fingers more frequently, the wavelength of waves..
- lengths
- shortens
shortens
The Doppler effect can be observed for..
- sound waves only
- light waves only
- either a or b
- neither a or b
either a or b
Sound is generally a ____ wave.
longitudinal wave
During a single period, the distance a wave travels is..
- 1/2 the wavelength
- the wavelength
- twice the wavelength
- independent of the wavelength
the wavelength
The greenish-blue (cyan) color of water is due to the..
- absorption of yellow light
- absorption of blue light
- absorption of red light
red light
Some springs are connected to a bar. One is pulled back and allowed to vibrate. Other springs, similar to the first begin to vibrate. This is an example of..
- forced vibrations
- sympathetic resonance
sympathetic resonance
If an electron vibrates vertically up and down, what direction will be polarized?
- longitudinal
- transverse, vertical
- transverse, horizontal
transverse, vertical
Most color printers only have magenta, yellow, and cyan inks. How can we get blue to print.
- mix magenta and cyan
- mix magenta and yellow
- mix yellow and cyan
mix magenta and cyan
The sky is blue because of air molecules in the sky act as tiny..
- scatters of high frequency light
- scatters of low frequency light
- prisms
- incandescent blue-hot sources of light
scatters of high frequency light
Bob stimulates a large motion in a flagpole by regularly pushing on it at its natural frequency. This phenomena is..
- flourescence
- forced vibrations
- resonance
resonance
On planet W, they have beautiful oceans of liquid stuff. We know that liquid stuff slightly absorbs blue light. What color are the beautiful oceans?
yellowish
Polarization is a property of
- transverse waves
- longitudinal waves
- both
- neither
transverse waves
Light from a regular light bulb is viewed through two polarizers. The first polarizer has its transmission axis vertical. How should the second polarizer be placed to have zero light transmitted.
- vertical
- horizontal
horizontal
Of the following, which has a wavelength about the length of your arm (1 meter)?
- Microwaves
- Ultraviolet light
- TV and FM radio waves
TV and FM radio waves
An ampere is a unit of electrical..
- pressure
- resitance
- current
- all of these
current
Compared to a single lamp connected to a battery, two lamps connected in parallel to the same battery will carry..
- more current
- less current
- the same current
more current
Compared to a single lamp connected to a battery, two identical lamps connected in series to the same battery will carry..
- more current
- less current
- the same current
less current
When we say an appliance “uses up” electricity, we really are saying that.
- current disappears
- electric charges are dissipated
- electron kinetic energy is changed into heat
electron kinetic energy is changed into heat
When astronomers observe the su, they see light coming from one edge having a higher frequency than from the other edge. This is due to..
the Doppler effect for light
