Quiz

Question 1

light is a form of _____

Answer 1

electromagnetic radiation

Question 2

light is composed of perpendicular oscillating waves, one for the ___ field and one for the ____ field

Answer 2

electric; magnetic

Question 3

a(n) ___ field is a region where electrically charged particle experiences a force

Answer 3

electric

Question 4

a(n)___ field is a region where magnetized particle experiences a force

Answer 4

magnetic

Question 5

speed of light

Answer 5

3.0 x 10^8 m/s

Question 6

the ____ is the height of the wave

Answer 6

amplitude

Question 7

the amplitude is the distance from ___ to ___

Answer 7

node to crest or node to trough

Question 8

the ___ is a measure of light intensity - the larger the amplitude the brighter the light

Answer 8

amplitude

Question 9

the ___ is a measure of the distance covered by the wave

Answer 9

wavelength

Question 10

the distance from one crest to the next (or one trough to the next) or the distance between alternate nodes is ___

Answer 10

wavelength

Question 11

the ___ is the number of waves that pass a given point in a given period of time

Answer 11

frequency

Question 12

the number of waves = the number of ___

Answer 12

cycles

Question 13

units for frequency

Answer 13

hertz or cycles/s = s^-1

Question 14

the total energy is ____ to the amplitude of the waves and the frequency

Answer 14

proportional

Question 15

the larger the amplitude, the more ___ it has

Answer 15

force

Question 16

the more frequently the waves strike, the ___ total force there is

Answer 16

more

Question 17

for waves traveling at the same speed, the shorter the wavelength, the ___frequently they pass

Answer 17

more

Question 18

the wavelength and frequency of electromagnetic waves are ___ proportional

Answer 18

inversely

Question 19

frequency equation

Answer 19

v = c/wavelength

Question 20

the color of light is determined by its ___ or ___

Answer 20

wavelength or frequency

Question 21

____ light is a mixture of all the colors of visible light

Answer 21

white

Question 22

The observed color is predominantly the colors ___

Answer 22

reflected

Question 23

electromagnetic spectrum (lowest to highest)

Answer 23

radio microwave infrared visible ultraviolet xray gamma

Question 24

1nm = ____ m

Answer 24

10^-9

Question 25

10^9 nm = ____ m

Answer 25

1

Question 26

the interaction between waves is called ___

Answer 26

interference

Question 27

_________ : when waves interact so that they add to make a larger wave (_ phase)

Answer 27

construction interference - in phase (crest w/crest, trough w/trough)

Question 28

______: when waves interact so they cancel each other it is called ___________

Answer 28

destructive interference; out of phase

Question 29

it was observed that many metals emit electrons when a light shines on their surface - this is called the ____ effect

Answer 29

photoelectric (shiny metal)

Question 30

if the wavelength of light is made shorter, or the light wave’s intensity made brighter, ___ electrons should be ejected

Answer 30

more

Question 31

the energy of a wave is ___ proportional to its amplitude and frequency

Answer 31

directly

Question 32

einstein proposed that the light energy was delivered to the atoms in packets called ___ or ___

Answer 32

quanta; photons

Question 33

the energy of a photon of light is ___ proportional to its frequency and ____ proportional to its wavelength

Answer 33

directly; inversely

Question 34

the proportionality constant is called ____ constant and has value of ____

Answer 34

Planck’s; 6.626x10^-34

Question 35

energy =

Answer 35

planck’s constant times frequency or planck’s constant times speed of light divided by wavelength

Question 36

kinetic energy =

Answer 36

energy of photon - binding energy