Curriculum
Course: IB Physics SL
time left:
:
:
Login

Curriculum

IB Physics SL

Theme A — Space, Time and Motion

0/80 Dr Dabour Hub Science Diagram and Course Material

Theme B — The Particulate Nature of Matter

0/87 Dr Dabour Hub Science Diagram and Course Material

Theme C — Wave Behaviour

0/60 Dr Dabour Hub Science Diagram and Course Material

Theme D — Fields

0/41 Dr Dabour Hub Science Diagram and Course Material

Theme E — Nuclear and Quantum Physics

0/59 Dr Dabour Hub Science Diagram and Course Material

Tools and Inquiry — IB Physics skills

0/54 Dr Dabour Hub Science Diagram and Course Material
Quiz

B.2.1 Albedo and Emissivity – Check yourself

Submit quiz
Once you submit, you will no longer be able to change your answers. Are you sure you want to submit the quiz?
Cancel Submit
  • Questions count: 6
  • Passing grade: B+
  • Time limit: 10 minutes
Start Quiz
1.
What is the SI unit of the Stefan-Boltzmann constant σ?
W m−2 K−4
W m−2 K−1
J K−4
W K−4
2.
The absolute temperature of a black body is tripled. The total radiated power increases by a factor of
3
81
27
9
3.
Which statement about albedo is correct?
It has units of W m−2
It is the ratio of emitted power to black-body power
It is the ratio of scattered to incident power
It is always greater than 1
4.
A star has surface temperature 7250 K. Its peak wavelength is closest to
200 nm
2000 nm
800 nm
400 nm
5.
On a graph of intensity against wavelength for a black body, raising the temperature causes the peak to
move to longer wavelength and get lower
move to shorter wavelength and get higher
stay at the same wavelength but get higher
move to shorter wavelength and get lower
6.
A surface of area 2.0 m² and emissivity 0.50 is at 400 K. The power it radiates is approximately
1.5 × 102 W
2.9 × 103 W
1.5 × 103 W
7.3 × 103 W
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
Part of Theme B — The Particulate Nature of Matter — see every lesson and quiz in this unit.
Accepted payment methods