Calculate the wavelength of electromagnetic radiation that would be released by the electron in hydrogen as it relaxes from the fifth energy level to the third energy level.

To measure the wavelengths in the spectrum of hydrogen
To determine the wavelength of a He-Ne laser using the diffraction pattern
Your report must include a Theory section, which must immediately follow your Abstract.  This section must be entitled “Theory.”  It must consist of a drawing (as shown in class) of the double-slit experiment, and must include the equations given in class.  It must be done in ink using a ruler.  The equations may be neatly written in the bottom right area of the drawing.
II. Pre-Lab (optional):
1. Calculate the wavelength of electromagnetic radiation that would be released by the electron (in hydrogen) as it relaxes from the fifth energy level to the third energy level. (1.28 x 10-6 m)
2. Compute the quantum of energy related to a spectral line of 375 nm. (5.30 x 10-19 J)
3. Convert 4230 A to nm and m.  What color is this light?
4. Some birds and fish can see in the near ultraviolet (UV); mammals have lost this ability.  Pit vipers can see in the infrared.  Give examples of a wavelength in these ranges

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