An electric field line emerges from a po...

An electric field line emerges from a positive poit charge +q at angle `alpha` to the striaght line connecting it to a negative point charge - 2q as shown in figure. At what angle `beta` wil the field line enter the charger - 2q?

`alpha`

`2Sin^(-1)((1)/(sqrt(2))sin""(alpha)/(2))`

`sin^(-1)((1)/(sqrt(2))sin""(alpha)/(2))`

`sin^(-1)((1)/(2sqrt(2))sin""(alpha)/(2))`

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