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A distant source, emitting radiation of frequency @, moving with a velocity of
3c
in a
4
direction as shown in the figure. Given that the upper cut-off frequency of the receiver is
5@
determine the least value of angle 0 for the receiver to detect the radiation.
3
Receiver
3c
4
Source
(а) 36.5°
(b) 41.4°
(c) 32.7°
(d) 48.1°

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