A light beam is described by E = 800 sin...

A light beam is described by E = 800 `sinOmega(t-x/c)`. An electron is allowed to move normal to the propagation of light beam with a speed of `3xx10^7ms^(-1)`. What is the maximum magnetic force exerted on the electron ?

`12.8xx10^(- 18) N `

`1.28xx10^(-21)N`

`1.28xx10^(-18)N`

`12.8xx10^(-17)N`

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