how to caluclate wave length?if wave length of an electromagnet radiation is 2000 A.what is energy in ergs very urgent please
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Assume that the medium is air or vacuum.
Wavelength = speed of light in medium / frequency of the radiation
Wavelength = Lamda = 2000 A = 2000 * 10^-10 meter = 2 * 10^-7 meters
Frequency = c / Lambda = 3 * 10^8 m/sec / (2 * 10^-7 meters)
= Nu = 1.5 * 10^15 Hz
Energy = h Nu, h = Planck's constant
= 6.626 * 10^-34 Joules-sec * 1.5 * 10^15 Hz / 10^-7 Joules/erg
= 9.939 * 10^-12 ergs
Wavelength = speed of light in medium / frequency of the radiation
Wavelength = Lamda = 2000 A = 2000 * 10^-10 meter = 2 * 10^-7 meters
Frequency = c / Lambda = 3 * 10^8 m/sec / (2 * 10^-7 meters)
= Nu = 1.5 * 10^15 Hz
Energy = h Nu, h = Planck's constant
= 6.626 * 10^-34 Joules-sec * 1.5 * 10^15 Hz / 10^-7 Joules/erg
= 9.939 * 10^-12 ergs
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