Question #6078b

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Answer 1 · 2017-10-05T05:40:59

Wavelength # lambda = 75m#

Given that :

Frequency =#f= 4000 KHz# = #4000 \times 10^3# Hz

Wavelength #lambda# = ?

#c = f\times lambda#

#lambda = c/f# where c= speed of light in vacuum = # 3 \times 10^8m/s#

Therefore

#lambda = \frac{3\times 10^8}{4000\times 10^3}#

#lambda = \frac{3\times 10^8}{4\times 10^6}# m

#lambda = \frac{3}{4}\times 10^(8-6)# m

#lambda = 0.75 \times 10^2# m

Wavelength # lambda = 75m#