Light
1. Is a luminescence source always cooler than a incandescence source?

Always
Sometimes
Never
2. What is the full form of LASER?

Light Amplification by Stimulated Emission of Radiation
Light by Stimulated Emitter of Radiation
Light by Stimulation of Emission of Rats
3. Is light a particle or wave?

Wave
Particle
Both
We don't know
4. An example of light would be?

Radio Waves
X-ray
T- Ray
All of the above
5. Free Electron lasers were fist developed in?

1978
1977
1957
1966
6. Frequency is another way of saying:

Crest
Trough
Pitch
7. Are phosphor compounds used to convert electron energy to light?

Yes
No
8. Are the waves that come from natural sources irregular?

Yes
No
Sometimes
9. Light is emitted when?

When an electron loses its energy?
When to particles collide?
When it is heated
All of the above
10. What happens when light is emitted or radiated?

The protons circle around the nucleus of an atom
The electrons circle around the nucleus an atom
The neutrons circle around the nucleus of an atom
All of the above
11. A spectrum is another word for saying?

Rainbow
Orbital
Fingerprint
All of the above
12. Lasers can be used in which of the following?

Military
Hospital
Medicine
All of the above
13. Free electron lasers are used in?

T-rays
Y-rays
V-Rays
X-rays
14. A common type of Gas Laser is helium-neon and _____________ lasers?

Oxygen
Carbon Dioxide
H-2-O (Chemical Compound)
All of the above
15. Electromagnetic Waves are __________.

Transverse
Charged Particles
Waves
All of above
16. Sound Waves travel... ( Which direction)

Outward
Inward
All of the above
Upward
17. Is white light made up of all of the colors of the spectrum

Yes
No
Some of the colors
18. How is light emitted?

Just through heat
Just when a particle hits another particle
When an electrons certain material loses energy
19. Inferred light is ?

Light with a lower frequency than visible light
Light with a higher frequency than visible light
20. How many defining characteristics are there to a wave?

1
2
3
4
21. Do solar cells use pure silicon?

Yes
No
22. What impurities are used to make N-type silicon?

Phosphorus
Oxygen
Hydrogen
All of the above
23. What impurities are used to make P-type silicon?

Phosphorus
Oxygen
Boron
24. What percent of total light that hits the solar cell is converted into electricity?

100%
90%
50%
15%
25. Are zinc light bulb filaments more efficient that tungsten filaments?

Yes
No
Sometimes
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