11. A linearly polarized plane wave () with a frequency of 100 MHz propagates in vacuum in the +z direction. It impinges normally on a perfectly conducting plane at z = 0 and gets reflected. The reflected wave is denoted by (). The incident and the reflected waves form a standing wave. Determine the location nearest to the conducting plane where the total magnetic field +is zero.
(A) z = -3 (m)
(B) z = -1.5 (m)
(C) z = -0.75 (m)
(D) none of the above.