Quantum Phenomena

Question 1

Quantum definition

Answer 1

A quantum is the smallest possible unit of a physical quantity

Question 2

Photon definition

Answer 2

quantum of light

Question 3

Photoelectric effect

Answer 3

the phenomenon of light causing electrons to be emitted from a metal

Question 4

Planck’s constant

Answer 4

The slope of the linear graph of Energy (dependent) vs. Frequency (independent). h = 6.63e-34 J*s

Question 5

Equation for energy of a photon

Answer 5

E = hf or, since f = c/lambda, E = hc/lambda

Question 6

The energy of a photon is _______ to its frequency but _________ to its wavelength.

Answer 6

proportional, inversely proportional

Question 7

Threshold frequency

Answer 7

The minimum frequency of incoming light necessary to release an electron from a metal surface

Question 8

For light above the threshold frequency, a brighter light ->

Answer 8

more photons and thus more electrons released from the metal

Question 9

Momentum of a photon equation

Answer 9

p = h/lambda

Question 10

Photons have momentum that is ________ to their wavelength

Answer 10

inversely proportional

Question 11

Heisenberg uncertainty principle

Answer 11

we cannot simultaneously measure the position and speed (or momentum) of a subatomic particle with complete accuracy.