In the plane mirror, the coordinates of image of a charged particle (initially at origin as shown in fig. after two and a half time periods are (initial velocity of charge particle `v_0` in the x-y plane and the plane mirror is perpendicular to the x-axis. A uniform magnetic field `Bhati` exists in the space. `P_0` is pitch of helix, `R_0` is raduis of helix.)

Options

A. `17P_0, 0,-2R_0`
B. `3P_0, 0,-2R_0`
C. `17.5P_0, 0,-2R_0`
D. `3P_0, 0,2R_0`

Answer

c

Explanation

After two and a half time periods, its x-coordinate will be `2.5P_0` (so x-coordinate of image will be `17.5P_0`). It will be at distance `2R_0` (equal to diametre) on the negative z-axis and y-coordinate will be zero.