SPECTRUM LAB DEMONSTRATION

In this exercise you will see how the spectra of different light sources differ.

The figure shows a lab table and several light sources as well as a window through which the Sun is visible.

On the table you can see two tubes, one containing hydrogen, the other containing mercury. You can also see a standard incandescent light bulb.

Move the mouse cursor over the light source to see its spectrum.

When you have looked at each of the spectra, you can then take a short quizz that will test your understanding of the differences between the spectra.

grblucir.gif

1. What type of spectrum is shown by the tube of hot hydrogen?
A).. Continuous
B)..Dark Line
C).. Emission line
D)..Doppler
E).. None of the above

2. What kind of spectrum does the standard light bulb show?
A)...Continuous
B)... Dark Line
C)...Emission line
D)...Doppler
E)...All of the above

3. What kind of spectrum does the Sun show?
A)...Continuous
B)... Dark Line
C)... Emission line
D)...None of the above

4. What can you deduce about the stae of the hydrogen from its spectrum?
A)... It is highly compressed.
B)... It is solid.
C)... It is liquid.
D)... It is gaseous.

5. What makes the mercury and hydrogen spectra look different?
A)... The hydrogen is hotter.
B)... The mercury is hotter.
C)... They have different sets of electron orbits.
D)... The mercury is metallic.
E)... The hydrogen contains more carbon, so its spectrum shows more black.


Your Answers
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Your answer to the question was
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Tom Arny
Last modified: Wed Aug 13 18:57:11 EDT 2003