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### Q. A charged rod attracts bits of cork dust which agter touching the rod , often jump violently away from it. why? Q. A charged rod attracts bits of cork dust which agter touching the rod , often jump violently away from it. why?

Answer: Some electrons of charged rod attracts bits of cork dust when we make a contact between them. After some time, charge on the both (cork dust and rod) are same. So, they repel each other.As shwon in the figures below;

### is wave function associatd with photon?

rahmat ali asked
is wave function associatd with photon?

Answer:
The wave-function extend forever into all of space, the wave function is what REPRESENTS the probability of finding the particle in a set state at a set position at a set time, its a mathematical construct to describe how the universe works, a model if you will. The wave function squared is the probability so that a real number not imaginary, this has nothing to do with the space itself, exactly right about the difference the wave-function is a mathematical construct applied across space from which you can derive the probability of finding a particle. As for the wave travelling infinitely fast, in quantum mechanics particles can move faster than light but it is highly improbable due to uncertainty principle, however at long distances that would allow this the probability goes incredibly low.

No I just believe the wave function to be a mathematical representation in that it is imaginary, it doesn't make …