Quanta

Question 1

What experimental observations cannot be explained by classical physics but can be explained by quantum physics ?

Answer 1

Black body radiation curves (Ultraviolet catastrophe)
The formation of emission and absorption spectra
The photoelectric effect

Question 2

Bohr model of the atom

Answer 2

Ggggg

Question 3

Describe experimental evidence for the particle like behaviour of waves and for the wave like behaviour of particles

Answer 3

Photoelectric effect for the particle like behaviour of waves and electron diffraction toon for the wave like behaviour of particles

Question 4

Is it possible to know the position and the momentum of a quantum particle simultaneously?

Answer 4

No

Question 5

Is it possible to know the lifetime of a quantum particle and the associated energy change at the same time?

Answer 5

No

Question 6

Implications of the Heisenberg Uncertainty Principle

Answer 6

Concept of quantum tunnelling - in which a quantum particle can exist in a position that according to classical physics it has insufficient energy to occupy.
Occurs in a Alpha decay

Question 7

Describe the Heisenberg uncertainty principle

Answer 7

Henhouse

Question 8

Explain the helical motion of charged particles in the Earths magnetic field

Answer 8

Uend

Question 9

Origin and composition of cosmic rays and how they interact with the earths atmosphere.

Answer 9

Cosmic rays - made up of protons and alpha particles when strike earths atmosphere they produce secondary particles in a cosmic air shower

Question 10

Define Simple Harmonic Motion

Answer 10

F=-ky

Question 11

What SHM equation (y=cos omega t and y=sin omega t ) , do you use when y=0 and t=0

Answer 11

Sin equation

Question 12

What SHM equation do you use when t=0 and y=a

Answer 12

Cos equation

Question 13

Compton scattering gives evidence for what.

Answer 13

Particle like behaviour by electromagnetic radiation

Question 14

Bohr model of the atom

Answer 14

Electrons are in circular orbits around nucleus
Electron orbits correspond to energy levels
Electrons can only occupy certain energy levels
Ground state in the lowest energy orbit
Electrons gain and lose energy to move energy levels
Electron completely removed from an atom is Ionised
Electron in ionised state is said to have zero potential energy
All energy levels within an atom have negative values.