A) 18.8m
B) 36.5m
C) 42.8m
D) 58m
Correct Answer: B
Solution :
Key Idea: Electromagnetic waves travel with speed of light. The relation between frequency \[(f)\], speed (c) and wavelength \[(\lambda )\] is \[f=\frac{c}{\lambda }\] Given, \[f=8.2\times {{10}^{6}}Hz,\,c=3\times {{10}^{8}}m/s\] \[\therefore \] \[\lambda =\frac{3\times {{10}^{8}}}{8.2\times {{10}^{6}}}=36.5\,m\]You need to login to perform this action.
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