![optics - How to determine if $R_1$ and $R_2$ for a lens is negative or positive? - Physics Stack Exchange optics - How to determine if $R_1$ and $R_2$ for a lens is negative or positive? - Physics Stack Exchange](https://i.stack.imgur.com/lOpDP.png)
optics - How to determine if $R_1$ and $R_2$ for a lens is negative or positive? - Physics Stack Exchange
![A plano convex lens of refractive index 1.5 and radius of curvature 30cm. Is silvered at the - YouTube A plano convex lens of refractive index 1.5 and radius of curvature 30cm. Is silvered at the - YouTube](https://i.ytimg.com/vi/WsnDN221kGM/maxresdefault.jpg?sqp=-oaymwEmCIAKENAF8quKqQMa8AEB-AH-CYAC0AWKAgwIABABGFsgWihlMA8=&rs=AOn4CLBtq5bqJRu1KGWHos2By-6QavgaTg)
A plano convex lens of refractive index 1.5 and radius of curvature 30cm. Is silvered at the - YouTube
![The radius of curvature of the convex surface of a Plano-convex lens is 10cm. What is the focal length of the Plano-convex lens? (Here $\\mu =1.5$)A. $10cm$B. $20cm$C. $15cm$D. $5cm$ The radius of curvature of the convex surface of a Plano-convex lens is 10cm. What is the focal length of the Plano-convex lens? (Here $\\mu =1.5$)A. $10cm$B. $20cm$C. $15cm$D. $5cm$](https://www.vedantu.com/question-sets/1b46e273-ef75-49bd-9ddd-46b193df14961540997652942818355.png)
The radius of curvature of the convex surface of a Plano-convex lens is 10cm. What is the focal length of the Plano-convex lens? (Here $\\mu =1.5$)A. $10cm$B. $20cm$C. $15cm$D. $5cm$
![Find the radius of curvature of the convex surface of a plano-convex lens, whose focal length is 0.3 - YouTube Find the radius of curvature of the convex surface of a plano-convex lens, whose focal length is 0.3 - YouTube](https://i.ytimg.com/vi/fJMOR0u4J9U/maxresdefault.jpg)
Find the radius of curvature of the convex surface of a plano-convex lens, whose focal length is 0.3 - YouTube
![A plano - convex glass lens (mug = 3/2) of radius of curvature R = 10 cm is placed at a distance of 'b' from a concave lens of focal length 20 A plano - convex glass lens (mug = 3/2) of radius of curvature R = 10 cm is placed at a distance of 'b' from a concave lens of focal length 20](https://dwes9vv9u0550.cloudfront.net/images/1836082/3e547122-2f88-4ec3-a72c-f0ded57a94b8.jpg)