Question
Asked Nov 17, 2019
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A certain radar installation that is used to track airplanes trasmits electromagnetic radiation with a wavelength of 3cm.  (A) what is the frequency?  (B) What time is required for a pulse of radar waves to reach an airplane 5 km away and return?

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Expert Answer

Step 1

Given data:

Wavelength of electromagnetic radiation = 3 cm = 0.03 m

Total distance travelled, d = 5+5 = 10 km = 10 x 103 km

Speed of light, c = 3 x 108 m/s

Step 2

(a)

The frequency of radiation can be calculated by the formula:

C
Where
vfrequency
A = wavelength
c speed of light 3x 108 m/s
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C Where vfrequency A = wavelength c speed of light 3x 108 m/s

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Step 3

Plugging in the gi...

C
3x108
0.03
1x100 Hz
)
(1
GHz 10
10 GHz
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C 3x108 0.03 1x100 Hz ) (1 GHz 10 10 GHz

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