Jones, H. Spencer (Harold Spencer), 1890- · London E. Arnold & co. · leaf 58
withthe inclination of the area to the direction of the source. Whenthe area is perpendicular to the source the maximum amountof heat is received, whereas no heat at all would be received ifthe area were parallel to this direction. The more obliquelythe rays strike, the less will be the total heat…
Astronomy
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
