Week 1 Flashcards
1
Q
What does LASER stand for?
A
Light amplification by stimulated emissions of radiation
2
Q
What are the 2 theories which laser is expressed?
A
Particles & waves
3
Q
does a photon have a charger?
A
no
4
Q
what do lots of photons together look like?
A
a wave.
5
Q
what is ‘amplitude’?
A
the height of a single peak or the depth of a single trough.
6
Q
hod do you measure the ‘wavelength’?
A
The distance between two peaks.
7
Q
a single peak or a single trough is called a what?
A
a pulse
8
Q
what is meant by the ‘frequency’?
A
the amount of waves that pass in 1 second. 1 second / the time it takes (T).
9
Q
what is the gain medium?
A
the laser cavity
10
Q
is laser light coherent or non coherent?
A
coherent
11
Q
what nm is the RUBY laser?
A
694nm
