a radio antenna emits electromagnetic waves at a frequency of 100 mhz and intensity of what is the photon density

photon density = 1.0 × photon/m³

Explanation:

given data

frequency f = 100 mhz = 100 × Hz

we consider here intensity I = 0.2 W/m²

solution

we take here plank constant is h i.e = 6.626 × s

and take energy density is E

so here

E × C = I  

E =   ................1

here C = 3 × m/s

so photon density is

photon density =     ...............2

photon density =

photon density = 1.0 × photon/m³

a) electrical > light, sound, and thermal< < < <

) the mechanical energy of the firefighter moving.< < < < a) electrical > light, sound, and thermal< < < <

c) both a and b.

a is the best answer your welcome