The force exerted by electromagnetic wave on unit area of the surface is called.........

{:("Column I","","Column II"),((a)" " "All electromagnetic waves including visible light", (p), "microwaves"),((b)" ""Electromagnetic waves whose frequency is in the range 500 kHz to 1000 MHz ",(q),"have the same speed c in vacuum"),((c)" " "The force exerted by an electromagnetic wave on unit area of surface", (r)," radio waves "),((d)" ""The shortest wavelength radio waves",(s), "radiation pressure") :}

The charge deposited per unit area of the surface is called

The total force exerted by the body perpendicular to the surface is called

The pressure exerted by electromagnetic wave of intensity I on a non - reflecting surface is ( where c= velocity of light ):