The amplitude of electric field in a parallel light beam of intensity `4Wm^(-2)` is

Find the amplitude of the elecric field in a parallel beam of light of intensity 8 W m^(-2) .

(i) Find the energy stored in a 90 cm length of a laser beam operating at 6 mW . (ii) Find the amplitude opf electric field in a parallel beam of light of intensity 17.7 W//m^(2) .

(i) Find the energy stored in a 90 cm length of a laser beam operating at 6 mW . (ii) Find the amplitude opf electric field in a parallel beam of light of intensity 17.7 W//m^(2) .

Find the amplitude of the electric field in a parallel beam of light of intensity 8.0W//m^2 .

Find the amplitude of the electric field in a parallel bean of light of intensity 2.0 W m^-2.

Find the amplitude of the electric field in a parallel bean of light of intensity 2.0 W m^-2.

Find the amplitude of the electric field in a parallel bean of light of intensity 2.0 W m^-2.