Question

why does human not feel the pressure of electromagnetic wave on his skin? Although it comes with the speed of light.

Answer 1

Mind-blowing question gotta say !
1. Well those electromagnetic waves have duality nature, I mean everything has a dual nature.. and they too.
2. In order to have a pressure they should exert force in a particular area that's the classic definition of pressure but those electromagnetic waves for eg light don't have a rest mass, they are totally transformed into the energy with 0 rest mass means no force thus no pressure.. we do have senses which can sense them like my eyes, skin.

Answer 2

Cause it's very very less.

The electromagnetic waves,since carry momentum,also exert pressure. But it cannot be felt by humans. Why is that? Because they travel at the speed of light. You might think since it travels so fast,it must exert large pressure. Not so. Let’s take help of a friend,Mathematics.

Let's take pressure exerted by sunlight on our palm. The solar intensity on earth is 1361 W/sq. m .

Since,momentum p= U(total energy)\c(speed of light)

For time=1 second

U=1361J/sq. m

Also,we know F= p/t

And Pressure P=F/A(area)

Where A=0.054 sq. m

Putting all these into our big fancy math machine,we get, Pressure =4.53*10^-6.

Which is very less.

But it should be noted that although this value is so small, it's not zero. If during Viking Mission,this was not taken factor,it would have missed Mars by 15,000 km!