The Poynting vector of an electromagnetic wave in vacuum is S = {(120 – McqOptions

MCQOPTIONS

1.	The Poynting vector of an electromagnetic wave in vacuum is S = {(120 W/m2) sin2[(8.0 rad/m) z + (2.4 × 109 rad/s) t]} k. What is the wavelength?
A.	0.24 m
B.	0.79 m
C.	0.0488 m
D.	0.068 m
Answer» C. 0.0488 m

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