Consider examples of monochromatic E-M radiation with the wavelengths given below

1. = 3000
2. = 4500
3. = 1 x 10^-6 m
4. = 10 x 10^-6 m
5. = 10 cm
6. = 20 m

(Hint: an Angstrom is 10^-10 meters)

For each of these examples:

• express the wavelength in microns
• compute the wave number (cm^-1)
• compute the frequency (sec^-1)
• indicate what class of radiation it is (e.g. ultra-violet, microwave, etc.)
• indicate whether the earth's atmosphere is generally opaque or transparent to this radiation