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Unformatted text preview: Moon line, as shown: Ignore atmospheric effects. a) What is the total solar power reflected by the lunar disk (i.e., P o in Watts)? b) What is the Moons brightness for &quot; = 30 ! (in W m-2 sr-1 )? 2. Sunlight is incident on a Lambertian surface at an angle of 45 to the normal. Assuming that the Sun has an exitance of 6.42x10 7 W/m 2 , a radius of 6.96x10 8 m and is at a distance of 1.5x10 11 m from the Lambertian surface, calculate the brightness of the surface observed by a sensor at 0.4 ! m. Ignore atmospheric effects. 3. Why is the sky blue? Why is it orange/red during sunrise and sunset? r Sun Moon (Lambertian Surface) Earth...
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- Spring '08