converging lens वाक्य

उदाहरण वाक्य

1. Converging lenses have positive optical power, while diverging lenses have negative power.
2. This type of zone plate pattern is the equivalent of a transmission hologram of a converging lens.
3. The focal length " f " is positive for converging lenses, and negative for diverging lenses.
4. The insertion of a converging lens in front of the taking lens reduces the focal length of the combination.
5. The device is made up of three converging lenses in two planes which are mounted with an angular separation of 120?on an electric rotator.
6. In contrast, an object placed in front of a converging lens or concave mirror at a position beyond the focal length produces a real image.
7. A close-up lens is a single or two-element converging lens used for close-up and macro photography, and works in the same way as spectacles used for reading.
8. A converging lens ( one that is thicker in the middle than at the edges ) or a concave mirror is also capable of producing a virtual image if the object is within the focal length.
9. Real images can be produced by concave mirrors and converging lenses if and only if the object is placed further away from the mirror / lens than the focal point and this real image is inverted.
10. For presbyopia and hyperopia, a converging lens provides the extra curvature necessary to bring the near point closer to the eye while for myopia a diverging lens provides the curvature necessary to send the far point to infinity.