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