Free points to those who rate this 5 stars and answer "Done". I don't think it lets more than 2 people answer so I guess the first 2 people who answer, get the points.

how do i rate it 5 stars?

Explanation:

done

Explanation:

convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach