The electric field of an electromagnetic wave in vacuum is given by

Q. The electric field of an electromagnetic wave in vacuum is given by

The wave is reflected from the 𝑧 = 0 surface. If the pressure exerted on the surface is 𝛼𝜖₀𝐸²₀, the value of 𝛼 (rounded off to one decimal place) is                       

Ans: 0.8

Sol: