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Laser safety

Where can you find the information about the class of a laser?
Manual
Laser itself
Google search
Wikipedia
You have a class III laser. What equipment from the list below MUST be used?
Safety goggles
Neutral Density FIlter
Beamblock
Interlock system
Gloves
You're given a laser with power around 12 [mW]. Which class does it belong to?
Class 1
Class 2
Class 3
Class 4
Which of the laser classes below are dangerous even in reflections?
Class 3
Class 2
Class 1
Class 4
The laser is considered to be Class 3 and above when its power exceeds ...
2 [mW]
10 [mW]
5 [mW]
20 [mW]
A class 2 laser can hurt your vision if you look directly into the beam for more than ...
2 seconds
5 seconds
50 seconds
0.5 seconds
30 seconds
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