Question

Calculate the wavelength of an electromagnetic wave (in mm) having a frequency of 45 Gigahertz (GHz)

Giga=10^9

Answer 1

Wavelength = velocity of light/frequency

                    = (3.00*10^8 m/sec)/(45*10^9 Hz)

                     = (3.00*10^8 m/sec)/(45*10^9 /sec)

                    = 0.00667 m

1 nm = 10^-9 m

Wavelength = 6.67*10^6 nm