Light with an Intensity of 1 KW/m² Falls Normally on a Surface

Multiple Choice

Light with an intensity of 1 kW/m² falls normally on a surface and is completely reflected.The radiation pressure is:

A) 1 kPa
B) 3 *10¹¹ Pa
C) 1.7 * 10^-6 Pa
D) 3.3 * 10^-6 Pa
E) 6.7 *10^-6 Pa