Urban canyons Because of the tall buildings and relatively narrow streets in some inner cities, the amount of sunlight illuminating these “canyons” is greatly reduced. If h is the average height of the buildings and w is the width of the street, the narrowness N of the street is defined by N = h/w. The angle θ of the horizon is defined by tan θ = N. (The value θ = 63° may result in an 85% loss of illumination.) Approximate the angle of the horizon for the following values of h and w.
(a) h = 400 ft, w = 80 ft
(b) h = 55 m, w = 30 m
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