what is a dielectric sphere?

[hebiator]

im confused about what a dielectric sphere is. I have tried googleing it but i couldnt find anything that useful, please help

[jtbell]

It's a sphere made of a dielectric material. A "dielectric" is a (usually) electrically insulating material such as you put between the plates of a capacitor in order to increase the capacitance.

What is the context of your question?

[hebiator]

it is in relation to optical tweezers, i read on wikipedia that they can be used for things such as a dielectric sphere.