chapter 7

Question 1

electromagnetic radiation

Answer 1

light or forms of energy that behave as light, is a way that energy can travel through space, has an electric component and a magnetic component

Question 2

wavelength

Answer 2

distance between two peaks in a wave (lambda)

Question 3

frequency

Answer 3

of waves or cycles per second that pass through a given point in space (script v)

Question 4

amplitude

Answer 4

the height of each wave

Question 5

electromagnetic radiation travels at what speed?

Answer 5

speed of light (c)

Question 6

c =

Answer 6

lambda/scriptv

Question 7

speed of light unit

Answer 7

meters/second

Question 8

until 1900, particles were thought…

Answer 8

to contain a certain mass, could gain or lose any amount of energy, and their location could be known

Question 9

energy is hypothesized to be a…

Answer 9

delocalized wave with no mass

Question 10

Max Plank

Answer 10

heated solid objects to incandescence, as temperature increases, the color went red to orange to yellow to white. The amount of energy depends on wavelength and energy was only lost/gained in whole number variables of Plank’s constant

Question 11

what does it mean to say energy is quantized?

Answer 11

It is only lost or gained in tiny packets called quantum

Question 12

diffraction

Answer 12

scattering of light from a regular array of points or lines

Question 13

photoelectric event

Answer 13

phenomena that occur when light strikes the surface of a metal and electrons are ejected when there exists a certain threshold frequency that must be surpassed

Question 14

for light with frequency less than Vo,

Answer 14

no electrons are emitted regardless of intensity of light

Question 15

for light with frequency greater than Vo

Answer 15

the number of electrons emitted increased as light intensity increased, and the kinetic energy of emitted electrons increased linearly with light frequency