Spectroscopy Lab
Objective: To
identify the elements shown via their emission spectrum using a
spectrograph. To use the spectrograph,
hold the small slit to your eye and view the lighted gas tube directly through
the viewfinder. Then look to your left
to view the emission spectrum for that element.
In your composition book make a drawing of the colors that you see and
their approximate distance from each other.
Pre-Lab Questions:
1.
How does an atom become excited? What happens when the electron returns to
ground state?
2.
How are we able to identify different elements from distant stars?
Spectroscopy drawings:
3.
Element #1:
4.
Element #2:
5.
Element #3:
6.
Element #4:
Element identification:
8.
Identify the elements by looking at the emission spectrum samples at your
table.
Element
#1: _______________ Element
#2: _______________
Element
#3: _______________ Element
#4: _______________
9.
Examine the sample emission spectrum from a nebula (a cloud of gas that will
become a star). Using your spectrums that you identified, determine what
elements are found in the nebula.
Questions:
10.
How is spectroscopy useful when examining a star or planet, especially when we
are unable to actually visit it?
11.
Look at the elements that were found in the nebula, then look at the periodic
table. Are there any similarities about these elements?
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