A beam of light travelling along X-axis is described by the electric field Ey = 900 sin ω (t–x/c). The ratio of electric force to magnetic force on a charge q moving along Y-axis with a speed of 3 × 107 ms–1 will be :
[Given speed of light = 3 × 108 ms–1]
(A) 1 : 1
(B) 1 : 10
(C) 10 : 1
(D) 1 : 2
