Your IP: Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. unit of power of a lens is \[m^{-1}\]. Another way to prevent getting this page in the future is to use Privacy Pass. Power of lens calculation. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. Optical power. The shorter the focal length, the greater the power. Figure shows a graph of v against u. The S.I. 2f = 30 … Cloudflare Ray ID: 5f8f9b0bdee2dc27 Power of a lens is –40, its focal length is (a) 4 m (b) – 40 cm (c) – 0.25 m (d) – 25 m. Login. Power of a Lens. P = f 1 Note: Convex lens has positive power and concave lens has negative power. The power of a lens is specified as P = \[\frac{1}{F}\], where f is the focal length. The focal length (f) of a converging lens is considered positive and that of a diverging lens is considered negative. Solution: From the graph, when v = u, the coordinate of the point of intersection is given as (2f, 2f), where f is the focal length of the lens. Lens Equation Problems and Solutions. The power for a convex lens is positive and the power for a concave lens is negative. You may need to download version 2.0 now from the Chrome Web Store. Power of lens and its unit. • Remember. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. It is a measure of the amount of deviation of light ray produced by a lens, more the power, more is the deviation. This is also known as diopter. Determine the focal length of the lens. Unit of power is Dioptre (D). Performance & security by Cloudflare, Please complete the security check to access. • Diopter formula. Power - definition Power of a lens is defined as the inverse of focal length (in meters) of the lens.

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