"ELECTROMAGNETIC SPECTRUM, FREQUENCY, WAVELENGTH. *** Answers to Problems *** (c) PCSCC, Inc., 1993 Type any key to exit. ||Enter frequency in Hertz or wavelength in meters. One or the other should be entered as 0. (a) What radiation has a wavelength of 400 nm (400*10^-9 m)? (b) What radiation has a frequency of 400 THz (400*10^14 Hz)? Type comma key to see answers. Type (F2) to return to application file."