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Old 26th Jan 2013, 08:56
  #251 (permalink)  
keith williams
 
Join Date: Jan 2011
Location: England
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If a radar pulse contains 300 cycles of RF energy at a frequency of 600 MHz, the physical length of the pulse is:

1550 metres
150 metres
1.5 metres
0.15 metres
Wavelength = c / frequency

c = 300 000 000 m/sec. f = 600 MHz = 600 000 000 cycles/sec

Wavelength = 300 000 000 / 600 000 000 = 0.5 metres

Pulse length =cycles x wavelength

Pulse length = 300 cycels x 0.5 m/cycle = 150 metres
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