In the above example what is the average force if surface is perpectly reflecting?

What kind of surface reflects light?

In what kind of surface regular reflection occurs?

Light with an enargy flux of 25xx10^(4) Wm^(-2) falls on a perfectly reflecting surface at normal incidence. If the surface area is 15 cm^(2) , the average force exerted on the surface is

Light with an enargy flux of 25xx10^(4) Wm^(-2) falls on a perfectly reflecting surface at normal incidence. If the surface area is 15 cm^(2) , the average force exerted on the surface is

"The angle of elevation of an aeroplane from a point 200m above a lake surface is 45∘ and the angle of depression of its reflection is 75∘ .The height of the aeroplane above the surface of the lake is"

What is the angle of deviation of a ray incident perpendicularly on a reflecting surface ?

Explain with a suitable example that pressure varies inversely as the area of to surface on which the force is applied, if the force remains remains constant.