(5.) Physics Hl/Sl. Quantum And Nuclear Physics / Astrophysics

44 Questions | By IBLindman | Updated: Mar 21, 2022 | Attempts: 415

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Quiz on physics section 13 and astrophysics, focusing on definitions. Don't screw up the definition questions! You getfree points if you just learn them.

Questions and Answers

1.

"Below a certain [...], no photoelectrons are emitted" Above, an aspect of the photoelectric effect is described. Which are the missing words?
2.

The minimum energy required for electrons at a surface to escape is called the [...] of the metal
- A.
  
  Threshold wavelength
- B.
  
  Blue shift
- C.
  
  Work function
- D.
  
  Planck's constant
3.

The dual nature of light is simply called "wave-particle duality"
- A.
  
  True
- B.
  
  False
4.

Is light a wave or is it a particle?
- A.
  
  Wave
- B.
  
  Particle
- C.
  
  Yes
5.

"All moving particles have a "matter wave" with a wavelength associated with them" This hypothesis has a name. Which?
- A.
  
  Davisson and Germer hypothesis
- B.
  
  De Broglie hypothesis
- C.
  
  Schrödinger hypothesis
- D.
  
  Bainbridge hypothesis
6.

Davisson and Germer conducted an experiment showing electron [...]
7.

The description of particles (matter and /or radiation) in quantum mechanics is in terms of a(n) ...
- A.
  
  Work function
- B.
  
  Wave function
- C.
  
  Orbital
- D.
  
  Interpretation (the Copenhagen interpretation)
8.

When a particle is observed, the wave function is said to [...]
9.

The Copenhagen interpretation is a way to give a physical meaning to the mathematics of nuclear physics
- A.
  
  True
- B.
  
  False
10.

"Position and momentum cannot be measured simultaneously" "Energy and time cannot be measured simultaneously" These linked variables are known as conjugate quantities in the [...] uncertainty principle
- A.
  
  Heisenberg
- B.
  
  Bainbridge
- C.
  
  De Broglie
- D.
  
  Schrödinger
11.

"The discrete energies observed, having been emitted by an alpha particle or gamma photon from a nucleus, correspond to the difference between two nuclear [...]
12.

The Bainbridge mass spectrometer provides evidence for the existence of ...
- A.
  
  Protons
- B.
  
  Neutrons
- C.
  
  Isotopes
- D.
  
  Nuclides
13.

The electrically neutral, virtually undetectable particle accounting for the "missing" energy in beta decay is known as a(n)
14.

"Antineutrino is the antimatter form of the neutrino, and accounts for missing energy in beta minus decay"
- A.
  
  True
- B.
  
  False
15.

A small rocky body that drifts around the Solar System is known as a(n)
16.

The bits of the asteroids that arrive on Earth are called ...
- A.
  
  Comets
- B.
  
  Earth asteroids
- C.
  
  Meteorites
- D.
  
  Constellations
17.

Comets are mixtures of rock and ice in elliptical orbits around the sun. Their tales always point towards the sun
- A.
  
  True
- B.
  
  False
18.

Any region of the sky labelled according to patterns of stars is known as a ...
19.

Stars are grouped into so-called stellar ...
- A.
  
  Groups
- B.
  
  Constellations
- C.
  
  Clusters
20.

Very large clusters are known as "abnormal clusters"
- A.
  
  True
- B.
  
  False
21.

Our sun is stable because their is an equilibrium between outward pressure and inward [...] force
22.

The total power radiated by a star is called its ...
- A.
  
  Apparent brightness
- B.
  
  Absolute brightness
- C.
  
  Apparent magnitude
- D.
  
  Luminosity
23.

"The power received per unit area by a receiver on Earth is called the absolute brightness of the star
- A.
  
  True
- B.
  
  False
24.

The seven main spectral classes, in order of increasing surface temperature, are the following:
- A.
  
  O, B, A, F, G, L, T
- B.
  
  O, B, A, F, G, K, M
- C.
  
  M, K, G, F, A, B, O
- D.
  
  T, L, G, F, A, B, O
25.

Within spectral class O, the stars are the hottest. Which color do these stars have?
- A.
  
  Blue
- B.
  
  Yellow
- C.
  
  White
- D.
  
  Red