A beam of light travelling along \( X \)-axis is described by the electric field \( E_{y} = 900 \sin \omega (t - x/c) \). The ratio of electric force to magnetic force on a charge \( q \) moving along \( Y \)-axis with a speed of \( 3 \times 10^{7} \ \text{m s}^{-1} \) will be:
(Given speed of light \( = 3 \times 10^{8} \ \text{m s}^{-1} \))
