The reference value for the radiation of GSM 1800 mobile telephony operators transmitting frequency of 1800 MH
a) What wavelength is electromagnetic radiation with a frequency of 1800 MHz?
b) Determine the energy of a photon with a frequency of 1800 MHz.
c) How many photons get maximum hit a detector to the test area 1.5 dm2 under a minute if the limit is not exceeded?