Which is a source of AC current?

A) heating the ball in boiling water
B) running the ball over a strong magnet
C) rubbing the ball back and forth on carpet
D) dropping the ball from a tall bulding

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

not copied too! hope this !

joke:

h o h o hope you have a merry christmas!

you can cut your hand off if your not