31

Question 1

What is a quantum of light called?

Answer 1

photon

Question 2

In the formulaE=hf, what doesfstand for?

Answer 2

The frequency of electromagnetic oscillation

Question 3

Does light travel from one place to another in a wavelike or a particle-like way?

Answer 3

wavelike

Question 4

Does light interact with a detector in a wavelike or a particle-like way?

Answer 4

particlelike

Question 5

When electrons are diffracted through a double slit, do they hit the screen in a wavelike way or in a particle-like way? Is the pattern of hits wavelike or particle-like?

Answer 5

Particle-like, wavelike

Question 6

If a beam of red light and a beam of blue light have exactly the same energy, which beam contains the greater number of photons?

Answer 6

a beam of red light

Question 7

A quantum of light is a _________.

Answer 7

smallest lump of light

Question 8

In the equationE = hf, thehis _________.

Answer 8

a proportionality constant

Question 9

When the frequency of a photon is doubled, the energy it carries _________.

Answer 9

doubles

Question 10

What exactly is ejected in the photoelectric effect?

Answer 10

Electrons

Question 11

Which are more successful in dislodging electrons from a metal surface: photons of violet light or photons of red light? Why?

Answer 11

Violet light is more successful because the higher energy of a violet photon interacts with a single electron and gives it enough energy to escape the metal.

Question 12

When does light behave as a wave? When does it behave as a particle?

Answer 12

Light is emitted and detected as a particle and travels as a wave.

Question 13

quantization

Answer 13

the idea that the natural world is granular rather than smoothly continuous.

Question 14

quantum

Answer 14

Any elemental particle that makes up matter or carries energy

Question 15

Energy of a quanta?

Answer 15

is E =hf

Question 16

Wave-particle duality

Answer 16

Photon behaves as a particle when emitted by an atom or absorbed by film, ect. But it behaves as a wave traveling from a source to the place it is detected.

Question 17

Who proved light was a wave?

Answer 17

young

Question 18

Who said radiant energy was emitted in discrete bundles?

Answer 18

Planck, called quantum

Question 19

Photoelectric effect

Answer 19

Proof that light is photons. The brighter and higher frequency of light on a photosensitive surface, the greater the velocity of ejected photons. The emission of electrons from a metal surface when light is shined on it.

Question 20

Particles as waves

Answer 20

wavelength = h/momentum Every particle of matter is associated with a corresponding wave.

Question 21

Uncertainty principle

Answer 21

states that plancks constant sets a limit on the accuracy of a measurement. It is not possible to measure exactly both the position and the momentum of a particle at the same time nor the energy and the time during which the particle has that energy.