Answer:

Explanation:
Uncertainty principle say that the position and momentum can not be measured simultaneously except one relation which is described below,

Given that the uncertainty in x is 0.1 mm.
Therefore,

Therefore, uncertainty in the transverse momentum of photon is 
Frictional Force is the answer..
Hope it helps
X- points away from the charge
y- points in the direction of the force on the positive charge
z- points toward the charge