GSM networks use microwaves of 20 cm in wavelength.
The energy carried by one trillion (10^12) photons of this wavelength is closest to ...
Question 1 answers
Instructions: The speed of light is c = 3 x 108 m/s
Plank's constant is h = 6.63 x 10-34 J s
The Attempt at a Solution
E = hf
c = wavelength x f
f = (3.00 x 10^8) / (0.2) = 1.5E9
E = 6.63 x 10-34 J s x 1.5E9
E = 9.945E-25
Do I Multiply by 10^12 to account for the energy carried by one trillion (10^12) photons making the answer 9.945E-13 of d from above