Q. 6 (a) Solar radiation of wavelength 0.50 um upon entering the earth atmosphere on the day of 17* February 2021 encounter scattering under following atmospheric condition when the sun is at zenith angle =60". Atmospheric pressure: 750 mm of mercury, atmospheric dust particle concentration: 800 per cm and depth of perceptible water column: 20 mm. Calculate the percentage transmission of solar radiation to the ground by atmospheric scattering (b) Calculate the intensity (irradiance) of direct solar radiation on the ground on that day