[1]This is obtained from k = gR², where g is the acceleration due to gravity and R is the radius of the earth. (Here, we can use k = 96,500 miles³ per second².) [2]Donald R. Herriott of Bell Labs had suggested using plane reflectors on satellites as long ago as 1957—although his idea was that this would increase their visibility, rather than aid in determining their attitude. [3]This method was developed by D. W. Hill of Bell Telephone Laboratories. [4]We will not attempt to go into all the details of semiconductor physics here. If you would like to know more about how solar cells work, refer to the Suggested Reading on page 88. [6]Published as part of the Bell System Aid to High School Science Program. Wraparound cover image
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