What is the purpose of collimating laser light?*
Anonymous Quiz
7%
To make it multidirectional
19%
To randomize its direction
74%
To concentrate it into a defined spot
What happens to an electron when it absorbs an amount of energy?
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8%
It stays in its lowest energy level (ground state)
86%
It moves to a higher orbital level (excited state)
5%
It releases a photon
2%
It stops moving
What is the process called when an electron releases an identical photon and returns to the ground state?
Anonymous Quiz
8%
Absorption
8%
Excitation
83%
Spontaneous emission
2%
Ionization
What term describes an electron that has absorbed energy and moved to a higher energy level?
Anonymous Quiz
6%
Ground state
5%
Ionized state
85%
Excited state
5%
Neutral state
What must occur for an atom to be in an excited state?
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16%
The electron releases energy
5%
The atom stops moving
67%
The electron absorbs energy
13%
The electron stays in the ground state
What is required for an electron to move from one energy orbit to another?
Anonymous Quiz
8%
The atom must be in the ground state
5%
The electron must lose mass
88%
An amount of energy equal to the energy difference between the two orbits
What occurs when an electron in an excited state releases an identical photon?
Anonymous Quiz
11%
It stays in the excited state
11%
It becomes a different element
77%
It returns to the ground state
The closer the electron is to the nucleus, the stronger its energy.
Anonymous Quiz
55%
True
45%
False
The further the electron is from the nucleus, the weaker its energy
Anonymous Quiz
34%
True
66%
False
What is the process called when a photon released from an excited atom stimulates another similarly excited atom to release an identical photon?
Anonymous Quiz
23%
Spontaneous emission
5%
Reflection
6%
Absorption
66%
Stimulated emission
What happens to the emitted photons during stimulated emission?
Anonymous Quiz
16%
They are absorbed by the atom
5%
They disappear
79%
They promote the release of additional identical photons
What is the result of stimulated emissions when a large number of atoms are excited?
Anonymous Quiz
8%
Increased heat
14%
Reduced light intensity
2%
Decreased energy
77%
Light amplification
Repeating the process Spontaneous emission causes the occurrence of
Anonymous Quiz
32%
Light amplification
7%
Decreased energy
13%
The atom stops moving
48%
Stimulated emission
What is the wavelength of the radiation emitted by a Helium neon laser?
Anonymous Quiz
3%
904 nm
88%
632.8 nm
6%
800 nm
3%
1064 nm
What type of radiation does a Helium neon laser emit?
Anonymous Quiz
18%
Infrared radiation
9%
Blue visible radiation
73%
Red visible radiation
What is the depth of penetration for a Helium neon laser before it loses 37% of its intensity?
Anonymous Quiz
76%
0.5 - 1 mm
15%
2 - 3 mm
3%
3 - 4 cm
6%
1 - 2 cm
What is the wavelength of the radiation emitted by a Semiconductor diode laser (Ga-As)?
Anonymous Quiz
82%
904 nm
6%
1099 nm
4%
632.8 nm
7%
800 nm