Imagine that concentric spheres are placed around the Sun at radii of 1, 2 and 3 parsecs. If the flux through the red patch (on shell 1) is 4 watts per square meter, then the flux through the blue patch (shell 2) is A. 16 watts per square meter B. 0.25 watts per square meter C. 1 watt per square meter D. 4 watts per square meter