Electromagnetic Spectrum

Radiation Wavelength(m) Frequency (1/s) Energy (J)
Cosmic rays 3 X 10-14 1 X 1022 6.6 X 10-12
Gamma rays 3 X 10-12 1 X 1020 6.6 X 10-14
X-rays 3 X 10-10 1 X 1018 6.6 X 10-16
Ultraviolet 3 X 10-8 1 X 1016 6.6 X 10-18
Visible (violet) 4.0 X 10-7 7.5 X 1014 5.0 X 10-19
Visible (indigo) 4.3 X 10-7 7.0 X 1014 9.5 X 10-19
Visible (blue) 4.5 X 10-7 6.6 X 1014 4.4 X 10-19
Visible (green) 5.0 X 10-7 6.0 X 1014 4.0 X 10-19
Visible (yellow) 5.65 X 10-7 5.3 X 1014 3.5 X 10-19
Visible (orange) 5.75 X 10-7 5.2 X 1014 3.45 X 10-19
Visible (red) 6.75 X 10-7 4.4 X 1014 2.9 X 10-19
Infrared 3 X 10-6 1 X 1014 6.6 X 10-20
Microwaves 3 X 10-4 1 X 1012 6.6 X 10-22
Radar 3 X 10-2 1 X 1010 6.6 X 10-24
FM, VHF, UHF 3 X 100 1 X 108 6.6 X 10-26
AM, Shortwave 3 X 102 1 X 106 6.6 X 10-28
Flame Tests
Blues
    Azure - CuCl2, CuBr2 (followed by green)
                 Same with copper compounds moistened with HCl
    Light Blue - lead, arsenic, selenium
Greens
    Emerald - Cu  compounds except halides (see above)
    Pure Green - Tl and Te compounds
    Yellowish - Ba compounds, some Mo, borates
    Bluish - phosphates with sulphuric acid
    Feeble - Sb and NH4+ compounds
    White - Zinc
Reds
    Carmine - Li compounds (violet through blue glass)
    Scarlet - Sr compounds (violet through blue glass)
    Yellowish - Ca compounds (greenish through blue glass)
Violet
    potassium, rubidium and cesium compounds (purple-red through blue glass)
Yellow
    all sodium compounds (invisible through blue glass)