A light beam is described by $E = 800\sin \omega \left( {t - {x \over c}} \right)$. An electron is allowed to move normal to the propagation of light beam with a speed of 3 $\times$ 107 ms$-$1. What is the maximum magnetic force exerted on the electron?

Question

A light beam is described by $E = 800\sin \omega \left( {t - {x \over c}} \right)$. An electron is allowed to move normal to the propagation of light beam with a speed of 3 $\times$ 10⁷ ms^$-$1. What is the maximum magnetic force exerted on the electron?

1.28 $\times$ 10^$-$18 N

1.28 $\times$ 10^$-$21 N

12.8 $\times$ 10^$-$17 N

12.8 $\times$ 10^$-$18 N

Solution

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