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Test List
Name:
Laser 1
Created By:
V. Gokal
Max Time:
2 mins
Select an option for each question and click Submit
1. When excited electrons are stuck by a photon and drops back to ground state, this is called:
ionisation
spontaneous emission
stimulated emission
population inversion
2. The intermediate energy state that some atoms posses, where excited electrons drop to and collect is called the:
ground state
excited state
work function
metastable state
3. When there are more electrons in the excited state than in the ground state, this is called:
optical pumping
population inversion
light amplification
ionisation
4. A laser light is monochromatic. Monochromatic means that the light is:
very intense
of single frequency
in phase
of high energy
5. If electrical energy is used to excite ground state electrons to an excited state, this is called :
optical pumping
a cascade reaction
light amplification
stimulated emission
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