Module 3 - Quantum Physics

Question 0

Threshold frequency

Answer 0

The lowest frequency of radiation that will result in the omission of electrons in the metal surface. The most metals, is frequently occurs in the region of the electromagnetic spectrum.

Question 1

One electronvolt

Answer 1

The energy of an electron, with charge 1.6×10^ -19 C, acquires when it rises through a potential difference of 1 V.

Question 2

De Broglie equation

Answer 2

And equation expressing the wavelength of the particle is the ratio of Planck’s constant and the particle’s momentum, mv

Question 3

Electron

Answer 3

Negatively charged subatomic particle. Conduction electrons travel around circuit creating an electric current.

Question 4

Electron diffraction

Answer 4

The process of diffracting electron through the gap (usually between atoms in a crystalline structure, for example graphite). An example of the wave-particle duality.

Question 5

Photocell

Answer 5

Component that reduces its resistance and like you to photoelectric emission of electrons.

Question 6

The photoelectric effect

Answer 6

The emission of electrons from the surface of material when electromagnetic radiation this incident on the surface.

Question 7

Photon

Answer 7

A quantum of light, often described as a particle of light.

Question 8

Quantum

Answer 8

A discreet, indivisible quantity.

Question 9

Wave-particle duality

Answer 9

The theory that states is it both ways and particle properties.

Question 10

Work function energy

Answer 10

The minimum energy required to release an electron from the material, measured in Joules (J).