Radio waves emitted from an antenna are picked up by a radar after reflection from an aircraft in 4 x 10-3S. .... Question 11375

Radio waves emitted from an antenna are picked up by a radar after reflection from an aircraft in 4 x 10^-3S. How far is the aircraft from the antenna? [c = 3 x 10⁸ms^-1 ]

6.0 x 10²ms^-1

1.2 x 10³km

3.0 x 10³km

6.0 x 10 ⁵km

Correct answer is D

Time = 1 x 4 x 10^-3sec

distance = velocity x time

= 3 x 10⁸ x 4 x 10^-3

= 6 x 10⁵m

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Radio waves emitted from an antenna are picked up by a radar after reflection from an aircraft in 4 x 10-3S. How far is the aircraft from the antenna? [c = 3 x 108ms-1 ]

Aptitude Tests

Radio waves emitted from an antenna are picked up by a radar after reflection from an aircraft in 4 x 10^-3S. How far is the aircraft from the antenna? [c = 3 x 10⁸ms^-1 ]