5.l Is it possible to slow light to almost zero miles/second? What machine would benefit from slowing light's speed?

This is what i found on google “kinetic energy. energy is transferred from one object to another when a reaction takes place. energy comes in many forms and can be transferred from one object to another as heat, light, or motion, to name a few. this energy would be in the form of motion, with the person lifting the blue ball to a higher level.” i hope this you

  concave means having an outline or surface that curves inward like the interior of a circle or sphere. so the mirror curves inward.