Tuesday, 21 January 2020, 7:18 AM
Site: The Science Portal: 21C Science with Style
Course: The Science Portal: 21C Science with Style (21CScience)
Glossary: IB Physics Glossary
Q

Quality factor

Q, is a measure of the ionization strength of various radioactive source.

Radiation type
Q
\alpha
20
Fast neutrons
10
Slow neutrons
3
Fast protons
1
\beta, \gamma, X-rays
1

Quantum efficieny

is the ratio of emitted electrons to incident photons falling on a pixel.
Increasing the quantum efficiency makes the CCD more sensitive to light.

Quasar

is a quasi-stellar radio source. A compact region in the center of a black hole. (d)