The little brother of a Navy
Radar Operator asked …
“Jim, tell me how does radar
work?”
“The radar transmitter emits
brief impulses of electromagnetic waves which are reflected from the target and
received by a special receiver. Since the speed at which electromagnetic waves
propagate is exactly known and the time they take to travel to the target and
back can be determined with a great degree of accuracy it is possible to
determine the range to the target as well as the direction to it.”
His little brother pondered a
moment, and then said …
“As long as you don’t know,
Jim, why don’t you just say so?”
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