A plane-polarized electromagnetic wave is travelling in free space along + x-direction. The amplitude of its electric field is Eo = 240 N/C and its frequency is 150 MHz. The electric field of the wave can be written as:

• A. E = {(240 N/C) sin [(2.09 rad/m) x + (6.27 × 108 rad/s) t]} j
• B. E = {(240 N/C) sin [(3.14 rad/m) x – (9.42 × 108 rad/s) t]} j
• C. E = {(240 N/C) sin [(2.09 rad/m) x - (6.27 × 108 rad/s) t]} j
• D. E = {(240 N/C) sin [(3.14 rad/m) x + (9.42 × 108 rad/s) t]} j