Explain why there is total internal reflection in an optical fibres

The optical fibers are thin, thus, the light entering from one side of the wire surface has more chances to reflect back from the inside surface due to the larger angle of incidence.

The angle of the strike is large due to the small size of the wire and this angle is greater than the critical angle.

As the angle of the incident light on the inside surface is greater than the critical angle, thus, the total internal reflection of the takes place.

Hence, there are more chances of total internal reflection of light inside the optical fiber wire than the emergence of light through the wire.

because growing process had stoped after 4-5 year

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!