What is the frequency of the EM radiation?

2- 700 mm Visible light 400 nm f= 43 x 1014 Hz 75 x 1014 Hz Wavelength (m) 3x 104 3 x 10 4 3 x 10 $ 3 x 10 12 Radio waves Infrared UV Gamma rays 60 Hz (ac current) Microwaves X-rays 10% 104 105 10 1010 10 12 1014 1016 1018 Frequency (Hz) Cellular phones Maritime and AM radio Maritime, aeronautical, TV FM TV Maritime, aeronautical, citizens aeronautical uses and mobile radio Ch 2 6 radio Ch 7-69 band, and mobile radio 104 105 106 10' 108 109 1010 1011 Frequency (Hz) In order to study the structure of a crystalline solid, you want to illuminate it with EM radiation whose wavelength is the same as the spacing of the atoms in the crystal (0.150 nm)