converging lens sentence in Hindi
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- Converging lenses have positive optical power, while diverging lenses have negative power.
- This type of zone plate pattern is the equivalent of a transmission hologram of a converging lens.
- The focal length " f " is positive for converging lenses, and negative for diverging lenses.
- The insertion of a converging lens in front of the taking lens reduces the focal length of the combination.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- The optical power of corrective lenses is measured in diopters, a value equal to the reciprocal of the focal length measured in metres; with a positive focal length corresponding to a converging lens and a negative focal length corresponding to a diverging lens.
- When this is achieved, the screen is replaced with a mirror and the diverging lens is inserted between the converging lens and the light source at such a distance to the mirror that the light returning through the diverging and converging lenses produces a sharp image on top of the luminous object.
- When this is achieved, the screen is replaced with a mirror and the diverging lens is inserted between the converging lens and the light source at such a distance to the mirror that the light returning through the diverging and converging lenses produces a sharp image on top of the luminous object.
- One special application is to determine the focal length of a diverging lens : A light source is placed at twice the focal length of a converging lens on one side and a screen at the same distance on the other side so that the image of the light source is the sharpest possible.
- In it, Kepler set out the theoretical basis of double-convex converging lenses and double-concave diverging lenses and how they are combined to produce a Galilean telescope as well as the concepts of virtual images, upright vs . inverted images, and the effects of focal length on magnification and reduction.
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