A laser beamhaving a wavelength 6000A & circular aperture 0.5cm is sent to moon. The distance from earth is 4*10^8m then calculate areal spread of the beam when it reached​
A laser beamhaving a wavelength 6000A & circular aperture 0.5cm is sent to moon. The distance from earth is 4*10^8m then calculate areal spread of the beam when it reached​