2 — Atomic phyiscs, electromagnetic waves, X-ray

Question 1

Give the energy and momentum of a photon with frequency f.

Answer 1

Question 2

Align in ascending order the following components of the electromagnetic spectrum according to their energy: microwaves, gamma, ultraviolet, visible light, X-ray, infrared, radiowaves.

Answer 2

Question 3

What is the definition of visible light?

Answer 3

Question 4

Define the limiting frequency (fmax) of braking radiation at an accelerating voltage of U.

Answer 4

Question 5

List the three most important mechanisms responsible for the absorption of γ and X-rays.

Answer 5

Question 6

What is the major difference between the photoeffect and the Compton effect?

Answer 6

Question 7

What is the minimal energy of a γ-photon needed for pair-production (not numerically)?

Answer 7

Question 8

Why is a heavy nucleus necessary for pair-production?

Answer 8

Question 9

What is annihilation?

Answer 9

Question 10

Define interference.

Answer 10

Question 11

What is constructive and destructive interference?

Answer 11

Question 12

What is the requirement for maximally constructive and maximally destructive interference if two propagating waves with identical wavelength interfere with each other?

Answer 12

Question 13

Give the condition for constructive interference for an electromagnetic wave with wavelength λ diffracted on a crystal with a grating constant of c. (angle of incidence is 90°)

Answer 13

Question 14

What is the definition of transverse and longitudinal waves?

Answer 14