[" An electromagnetic wave with pointing vector "5W/m^(2)" is "],[" absorbed by a surface of some area.If the force on the "],[" surface is "10^(-7)N" ,then area is: "],[[" (a) "6m^(2)," (b) "3m^(2)],[" (c) "60m^(2)," (d) "4m^(2)]]