Question

Which of the following is a possible equation for the electric field of an electromagnetic wave with average intensity 0.00132W/m2 traveling in the +z direction with a magnetic field along the x axis?
a. ?=(2 V/m) sin [(9.8x106 /m)z + (2.9x10^15 Hz)t] ?̂
b. ?=(1 V/m) sin [(9.8x106 /m)z - (2.9x10^15 Hz)t] ?̂
c. ?=(1 V/m) sin [(9.8x106 /m)z - (2.9x10^15 Hz)t] ?̂
d. ?=(2 V/m) sin [(9.8x106 /m)z + (2.9x10^15 Hz)t] ?̂

Which of the following is a possible equation for the electric field of an electromagnetic wave with average intensity 0.00132W/m2 traveling in the +z direction with a magnetic field along the x axis? a. E (2 V/m) sin [ (9.8 x 106 /m)z (2.9 x1015 Hz)t] î b. E (1 V/m) sin [ (9.8 x 100 /m)z - (2.9 x1015 Hz)t]j c. E (1 V/m) sin [ (9.8 x 106/m)z - (2.9 x1015 Hz)t] î d. E (2 V/m) sin [ (9.8 x 106 /m)z (2.9 x1015 Hz)t]j =

Answer 1

Solution ] Given Targa 0.00132 W at CEOVE2 where to = 8.85 x 1" (² I n E = (= 34108 m/s E= Elector fell 2x Targ CxEo 2x0.00132 271.8*.48x112 1 - 1 v/m & E= 1v/m Now given magnetic field is along x A xin) it may be either (+ x) as (-x) and ware is propogating along (+2) diretion So, magnetic and Electric field are always perpendicules to the direction of propagation u Som Electric field will be in (j) or (+j) (FB) = +K ie 8x1 - 1) =+27 and E= 1 v/m] So either 6 or ③ option it comet but in ophon © bygnetic field is in (2x) so Electric field should be inl+j) direction, but given in (i) direction V

So option is incorrect and in option (B) E=1v/m and Electric field is in i direction and magnetic field in x(i) direction so lixj) = : option (B) is correct @ and @ option E & 1 V/m So incorrect