What happens to a light ray that passes through the optical center of a convex LENS?

Question

i have to do a diagram of a convex LENS. light rays are going into the convex mirror **not parallel ** to the principle axis.

Answer 1

In theory, the one going through the exact centre will not change direction.

However, because the lens will have some thickness, a light ray that arrives just a bit off the centre will be refracted just as it enters the glass, pass through the centre, then get refracted back on a parallel track as it comes out of the glass.

If will be in the same direction as before but not exactly on the continuation of it pre-entry line. It will be on a parallel line, offset by a tiny amount.

Answer 2

The key in the question is the "not parallel" part. A light ray that travels along the centerline of a lens, convex or not, doesn't bend because it meets both surfaces of the lens at a right angle. Unless the lens has an index of refraction equal to the medium surrounding it, that is the ONLY ray for which this is true. Figure your light paths according to the surface angle, just like any other place on the lens.

Answer 3

For a thin lens, the ray passing through the optical center is undeflected. For a thick lens, the ray does a dogleg hop and emerges parallel to its original direction.

Answer 4

any ray passing through the optic centre emerges out without causing refraction (bending) and passes in the same direction

Answer 5

the light bends toward the folcal point

Answer 6

You might check here.
Quite difficult to make diagrams in this system.

http://www.physicsclassroom.com/Class/refrn/U14L5a.html

Answer 7

It gets weaker.

Answer 8

They don't bend

Answer 9

http://www.glenbrook.k12.il.us/GBSSCI/PHYS/CLASS/refrn/u14l5da.html