A radiation of energy ‘E’ falls normally on a perfectly

A radiation of energy ‘E’ falls normally on a perfectly reflecting surface. The momentum transferred to the surface is (C = Velocity of light)

Momentum of light falling on reflecting surface

p =	E
	C

As surface is perfectly reflecting so momentum reflect

p¹ = -	E
	C

So, momentum transferred

= P - P¹ =	E	-		-	E
	C				C

=	2E
	C

	2E
	C²

	E
	C²