Emission of Light
Click on the correct answer.
1
The technical name for the lamps Lori used in this demonstration was
neon lights
glass lamps
electrical lamps
fluorescent lamps
gas discharge lamps
2
Which of the following was (were) necessary in this demonstration to see the result:
Gas discharge tubes (lamps) were needed
a power source was necessary
the power source served to provide electrical energy
electricity was passed through the gas in the gas discharge tubes
the tubes contained a vacuum
3
The state in which electrons within an atoms reside under normal conditions (before the demonstration) is
the lowest energy state possible
the average energy state
the highest energy state possible
the excited state
the ground state
4
The energy state that is of highest energy for the electrons when the electric current is turned on is known as
the "ground state"
the "electric state"
the "upper state"
the "energetic state"
the "excited state"
5
While electric current is passed through the gas discharge tubes
no light is being emitted
light is being continuously emitted
the electrons are always in the ground state
the electrons are always in the excited state
the electrons move back and forth in energy between their ground state and their excited state
6
When an electron moves from the excited state in an atom to the ground state
electricity is absorbed by the atom
electricity is emitted by the atom
light energy is absorbed by the atom
energy is given off by the atom
light energy is given off by the atom in the form of a specific color of light
7
A spectrum
is a single energy
is a series of discontinuous energies
is a series of high energies and low energies with none in between
is a series of continuous energies from high to low
is a series of continuous energies from low to high
8
The light emitted from neon atoms (Ne)
is a full spectrum
is a discontinuous spectrum
has only certain spectral lines in it
is mainly blue light
is mainly yellow light
9
In the full color spectrum shown in the presentation
red light (infrared) is the lower energy light of the spectrum
red light (infrared) has the longer wavelength
violet light (ultraviolet end of the spectrum) is the lower energy light of the spectrum
violet light (ultraviolet end of the spectrum) is the higher energy light of the spectrum
the ultraviolet light ('radiation") is what causes skin damage during sunburn
10
Of the three spectra on the slide, which one would be best seen as yellow light?
the neon spectrum, Ne
the sodium spectrum, Na
the mercury spectrum, Hg
all of the above would be seen as yellow light
two of the above would be seen as yellow light