Definitions of Waves





an angstrom is

A a very short unit of distance

B a very long unit of distance

C a unit of frequency

D a unit of amplitude.



the wave characteristic most closely associated with the visual impression of brightness is

A speed

B frequency

C amplitude

D Doppler shift



which of the following wave characteristics is related to the brightness of a light source

A speed

B wavelength

C frequency

D amplitude?



as the wavelength of light increases

A the color gets redder

B the frequency increases

C the frequency decreases

D the brightness decreases



which of the following properties of light is associated with brightness

A wavelength

B speed

C amplitude

D frequency



light waves of greater frequency have

A shorter wavelength.

B longer wavelength.

C either of the above; there is no direct connection between frequency and wavelength.



the velocity of visible light waves is

A less than the theoretical value

B equal to the theoretical value

C greater than the theoretical value

D not related to the theoretical value



an angstrom is

A a unit used to measure distances to stars

B a unit to measure velocities of stars

C a unit used to measure the wavelength of light

D no choice



which of the following characteristics are the same for all light waves traveling in a vacuum

A amplitude

B frequency

C wavelength

D speed



the "angstrom" is a unit of length often used for

A wave lengths of visible light

B distances in the solar system

C distances between stars

D distances on the sun



for light waves, high frequency corresponds to

A long wavelength

B short wavelength

C high speed

D low amplitude



a photon is

A a moving electric charge

B a bundle of light waves

C a new unstable elementary particle

D a figment of our imagination



if the frequency and speed of an ultraviolet light wave is known, its wavelength

A cannot be determined without additional information

B can be determined only after lengthy and complicated calculations

C can be determined easily from a single formula

D is equal to its frequency.



a bundle of light waves is called a

A quantum number

B photon

C tachyon

D neutrino



the wave in the term "light wave" refers to

A the changing strength of the electric force

B the motion of particles moving along with the wave

C the oscillating motion of an invisible medium

D no concept at all but just a convenient phrase



the amplitude of a visible light wave is related to our perception of

A color

B brightness

C speed

D Doppler shift



vision in animals is possible when

A small particles given off by electrons enter the eye

B an electron from another object enters the eye

C electrons in the eye vibrate in sympathetic vibrations with electrons in another object

D atoms in the eye become very hot in reaction to some other heated substance



comparing visible light to radio, which carries more energy?

A visible light

B radio waves

C both carry the same amount of energy because they travel at the same speed.



the speed with which a changing electric force moves in a vacuum is

A dependent on the strength of the force

B dependent on the rate of change of the force

C infinitely fast

D the speed of light



the speed of light in a vacuum is

A always constant

B dependent on the speed of oscillation

C unmeasurable

D dependent on the color



the wavelength of visible light is

A millions of light years

B nearly one mile

C about an inch

D a tiny fraction of an inch



the speed of light in a vacuum depends on

A the frequency

B the wavelength

C the distance it has traveled

D nothing, it is a constant



the wavelength of a wave is

A the height of the wave

B the distance the wave travels

C the distance between crests of the wave

D the distance the oscillating electron moves in one oscillation



the speed of light in space is

A variable, depending upon the speed of its source, but very large

B infinite, traveling through space instantaneously

C very large, independent of the speed of its source

D very large, but unmeasurable



an angstrom is

A a unit of time

B a unit of frequency

C a unit of length used for large astronomical distances

D a unit of length used in spectroscopy



the speed of a light wave can be determined easily

A by measuring the length of time it takes to travel a certain distance

B by measuring its amplitude

C if its wavelength and frequency are known

D if the oscillations of the electron can be measured



a photon is a bundle of

A charged particles

B imaginary waves traveling in the aether

C oscillating electric and magnetic waves

D unknown particles.



as the wavelength of a wave is increased, its frequency

A increases

B stays constant

C decreases

D changes independently of the wavelength



since the velocity of light is constant, light of shorter wavelength will have

A a higher frequency.

B the same frequency.

C a lower frequency compared to light of longer wavelength.



as the frequency of a light wave increases its

A amplitude must increase

B amplitude must decrease

C wavelength must increase

D its speed remains constant



all photons moving through space have the same

A wavelength

B frequency

C energy

D speed



radio waves travel through space at what speed?

A much faster than the speed of light

B much slower than the speed of light

C slightly faster than the speed of light, since their wavelength is longer

D at the speed of light



the longer the wavelength of a light wave,

A the smaller the frequency

B the larger the frequency

C the frequency is always the same

D the frequency does not depend on wavelength



a photon is

A a positively charged nuclear particle

B an instrument that astronomers attach to a telescope to help record light

C an element with a high atomic number

D a packet of light waves



the speed of a light wave in a vacuum

A depends on its frequency

B depends on its wavelength

C depends on its energy

D is always the same



the distance between a crest and the adjacent trough in a wave is

A its wavelength

B half its wavelength

C twice its wavelength

D its amplitude



in light of the same color, each photon has the same

A wavelength

B energy

C frequency

D all of the above



as the wavelength of a light wave becomes longer

A its frequency decreases

B its energy increases

C its mass increases

D its velocity decreases



the wavelength of visible light is about

A an inch

B a centimeter

C a hundred thousandth of an inch

D a mile



all light waves moving through empty space have the same

A wavelength

B frequency

C energy

D speed



two beams of light that differ in color must have

A different wavelengths

B different amplitudes

C different reflection

D different speeds



the brighter a beam of light, the

A faster it travels in a vacuum

B longer its wavelength

C shorter its wavelength

D greater its amplitude



if the frequency of a light wave is given, to find the wavelength you must

A measure it since it can have any value

B perform a simple calculation

C perform a complicated calculation beyond the level of this course

D none of the above is correct



all forms of light traveling in a vacuum have the same

A speed

B energy per photon

C wavelength

D frequency



visible light has a wavelength of about

A 1,000,000 inches

B 1 inch

C 0.01 inches

D 0.000001 inches



the color of a light wave is related to its

A wavelength

B speed

C energy

D Doppler shift



the wavelength of a wave is defined as

A the distance between wave crests

B the distance the wave travels in one second

C the difference in color relative to red

D the height of the wave



the speed of light in a vacuum

A increases as the wavelength increases

B increases as the frequency increases

C increases as the amplitude increases

D is the same for all light waves



the wavelength of visible light is approximately

A a billionth of an inch

B a few hundred thousandths of an inch

C an inch

D a yard



which of the following characteristics of a light wave is ordinarily associated with color

A speed

B amplitude

C wavelength

D frequency?



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