If you want to know what will do this, a lens will, or a curved mirror
The condenser-- when answering for a microscope!
The focal point.Other answersWhen rays of light converge? I think it is called the "refraction." :)focal point ....would be preferredrefraction is more why it changes
They make the light rays converge to a point. Parallel rays converge at the focal point of the lens
light rays converge at the focal plane
Rays which are parallel to the axis of the concave mirror will converge to the focal point.
The condenser-- when answering for a microscope!
Focus or the focal point.
The focal point.Other answersWhen rays of light converge? I think it is called the "refraction." :)focal point ....would be preferredrefraction is more why it changes
They make the light rays converge to a point. Parallel rays converge at the focal point of the lens
light rays converge at the focal plane
They make the light rays converge to a point. Parallel rays converge at the focal point of the lens
Rays which are parallel to the axis of the concave mirror will converge to the focal point.
spread out aplus users
If the lens is convex, they will be diffracted and focused to a point, after which they will spread out. If it's concave, they will be diffracted so that they spread out without first concentrating.
When you're looking at a near object, the light rays converge at a point behind the retina so the focal length of your eye increases so that the parallel rays of light converge on the back of the retina. Therefore, if you're looking from a near object to a far object, the focal length of your eye should decrease back to its normal, relaxed size.
IF you meant a convex lens - light entering the lens is bent because it's passing from one medium to another - to converge at the focal point.
Optical power is the degree to which the lens will converge or diverge light. The unit of measurement is the diopter and is directly related to how much a beam of light is bent by the lens.