A) 0.80 m, 0.63 m
B) 0.63 m, 0.80 m
C) 0.50 m, 0.85 m
D) 0.63 m, 0.75 m
E) 0.50m, 0.75m
Correct Answer: D
Solution :
Apparent wavelength, in front of locomotive \[\lambda =\frac{\lambda (v-{{v}_{s}})}{v}\] Or \[\lambda =\frac{v-{{v}_{s}}}{v}\] \[=\frac{345-30}{500}=\frac{315}{500}=0.63\,m\] Behind locomotive, \[\lambda \,\,=\frac{\lambda (v+{{v}_{s}})}{v}\] \[=\frac{v+{{v}_{s}}}{v}\] \[=\frac{345+30}{500}=\frac{375}{500}=0.75\,m\]
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