Hi, I have a simple question related with asymptotic freedom. Quarks behave as free particles at small distance (separation between the quarks is small) because strong interaction decrease with decrease in distance or increase in energy. So, one quark feels almost independent of other. Now, in DIS where hadron is probed by high energy electron: basically virtual photon interact with quarks inside the hadron. The interaction is electromagnetic. At high energy or short distance the electromagnetic interaction is larger. There is no strong interaction with the projectile. Then, why electron sees the quarks as free? Quark-quark feel them self as free from each other. Thanks.