Radar uses radio waves of a wavelength of 2.4 \({\rm m}\) . The time interval for one radiation pulse is 100 times larger than the time of one oscillation; the time between pulses is 10 times larger than the time of one pulse. What is the shortest distance to an object that this radar can detect? Express your answer with the appropriate units.

120 m

Explanation:

Given:

wavelength 'λ' = 2.4m

pulse width 'τ'= 100T ('T' is the time of one oscillation)

The below inequality express the range of distances to an object that radar can detect

τc/2 < x < Tc/2 ---->eq(1)

Where, τc/2 is the shortest distance

First we'll calculate Frequency 'f' in order to determine time of one oscillation 'T'

f = c/λ (c= speed of light i.e 3 x m/s)

f= 3 x / 2.4

f=1.25 x   hz.

As, T= 1/f

time of one oscillation T= 1/1.25 x  

T= 8 x s

It was given that pulse width 'τ'= 100T

τ= 100 x 8 x => 800 x s

From eq(1), we can conclude that the shortest distance to an object that this radar can detect:

= τc/2 =>  (800 x x 3 x )/2

=120m

i think the answer would be b

the answer would most likely be c, because if it's a comical piece of information, it may likely not be true, if it's a site that allows anybody to edit the content, it could mean a five year old is typing the info, and if it's a tv show produced by a celeb, it may have a biased opinion.