Ok so this will probably will sound stupid to you but please put an effort into elaborating with my train of thought thank you :)
For no particular reason this question popped in my head:
People can burn small wooden plates with a 1Watt laser.
There are places in a city were you can find cellular antennas that are like 3 Watt
Why dont those antennas burn my skin for example since they have thrice the power of the laser?
Well "thats easy" I said to my self...
The laser concetrates the light into one point (idially) and the antenna spreads out the light to all directions in cover an entire area
and now the problems begin...
So my initial thought because of this was that a laser could burn me because I would receive 1watt/1point=1 watt on a point on my skin
And I dont get burned by a cellular antenna because I will receive only a part of its spreaded power so I calculated 3watt/4πr^2~=0.2389watts (asuming that I am 1 meter away from the transmitter, I also assumed that that I should divite the power using the surface area of a sphere because thats how impagine that the signal spreads out like a sphere that gets bigger and bigger :P )
but now things started to get blur for me... shouldnt this be the amount of power given in a specific point of surface the so even if only a part of that surface area falls on me wouldnt that be a great amount of energy?
how many things am I missing? :P