WebAnswer. As we know, \text {Power} = \dfrac {1} {\text {focal length}} Power = focal length1. Given, Power of the lens = +2.0D. As the given power is positive, Therefore, we can … WebMar 16, 2024 · The power for a convex lens is positive and the power for a concave lens is negative. Lens Equation Problems and Solutions. Figure shows a graph of v against u. Determine the focal length of the lens. 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 …

Find the focal length of a lens of power ( - 2.0)D. What …

WebMar 10, 2024 · Answer: f=-50cm The power of a lens is defined as the reciprocal of the focal length. Lens power is measured in dioptres (D). Converging (convex )lenses have positive focal lengths, so they also have positive power values. Diverging (concave ) lenses have negative focal lengths, so they also have negative power values Advertisement … いやなおと ポケモン

Find the focal length of a lens of power -2.0 D. What type of lens …

WebNov 11, 2024 · Power of lens = -2.0D. Unknown: Focal length = ? Solution: The power of lens is the reciprocal of the focal length; P = where f is the focal length f = = The lens is a diverging lens. Advertisement Advertisement New questions in Physics. You roll a 5 kg bowling ball down the alley at 5 m/s. How much kinetic energy does it have? WebMay 8, 2024 · 1- find the formula between power & focal length which is p = 1 / f (where p is power & f is focal length ) Negative sign show that it is diverging lens or concave … WebSep 23, 2024 · The focal length of the convex lens is positive and hence its power is also positive. The formula fo r calculating the power of a lens is: P = 1/f. Where f is the focal length which is in metres. CALCULATION: Given that: Power (P) = - 2.5 D. From the formula of the power of the lens: focal length (f) = 1/P. ozone action day alert colorado