Light Lens

What happens to a ray of light passing through the optical center of a convex lens?

I have to make a diagram of a convex lens. rays of light in the convex mirror is ** not ** parallel to the axis principle.

In theory, that is on the exact center is not going to change direction. However, because that the lens has some thickness, a ray of light that reaches a bit outside the center is refracted as it enters the glass, pass through the center, then get refracted back on a parallel track, as it comes out of glass. If will be in the same direction as before, but not exactly in the continuation of the same line of pre-entry. Be in a parallel line offset by a small amount.

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