ans is 1 and 3 ..
becoz their is no effect of velocity on the particles which are passing without ne deflection .
things changes only in case of head on collision particle. with increasing velocity distance of closet apprraoch dereases.
r0 =4Ze2/4
e0mv02
Moderation Team
![[Post New]](/templates/default/images/icon_minipost_new.gif){kind=icon}
![[Up]](/templates/default/images/icon_up.gif "[Up]"){kind=icon}
253
