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A convexo-convex lens has focal length of f=10 cm.One of lens surfaces having radius of curvature of R=10 cm is coated with silver.Find position of image if object is at distance of 15 cm from lens.Refractive index of lens=1.5.(Ans.-2.14 cm)Please explain.
Dear student, We have the Lens Formula as: 1/f = 1/v – 1/uwhere f= focal lengthv = image distanceu = object distance There is a relation between radius of curvature and focal length given by the Lens Maker’s Formula. 1/f = (1μ2 – 1) (1/ R1 – 1/R2)where f = focal length1μ2 = μ2/ μ1 = refractive index of the second medium / refractive index of the first mediumR1 = radius of curvature of the first refracting surface of the lensR2 = radius of curvature of the second refracting surface of the lens. Please feel free to ask your queries here. We are all IITians and here to help you in your IIT JEE preparation. All the best. Win exciting gifts by answering the questions on Discussion Forum. So help discuss any query on askiitians forum and become an Elite Expert League askiitian. Now you score 5+15 POINTS by uploading your Pic and Downloading the Askiitians Toolbar respectively : Click here to download the toolbar.. Askiitians Expert Sagar Singh B.Tech, IIT Delhi
Dear student,
We have the Lens Formula as:
1/f = 1/v – 1/uwhere f= focal lengthv = image distanceu = object distance
There is a relation between radius of curvature and focal length given by the Lens Maker’s Formula.
1/f = (1μ2 – 1) (1/ R1 – 1/R2)where f = focal length1μ2 = μ2/ μ1 = refractive index of the second medium / refractive index of the first mediumR1 = radius of curvature of the first refracting surface of the lensR2 = radius of curvature of the second refracting surface of the lens.
Please feel free to ask your queries here. We are all IITians and here to help you in your IIT JEE preparation. All the best. Win exciting gifts by answering the questions on Discussion Forum. So help discuss any query on askiitians forum and become an Elite Expert League askiitian. Now you score 5+15 POINTS by uploading your Pic and Downloading the Askiitians Toolbar respectively : Click here to download the toolbar.. Askiitians Expert Sagar Singh B.Tech, IIT Delhi
Please feel free to ask your queries here. We are all IITians and here to help you in your IIT JEE preparation.
All the best.
Win exciting gifts by answering the questions on Discussion Forum. So help discuss any query on askiitians forum and become an Elite Expert League askiitian.
Now you score 5+15 POINTS by uploading your Pic and Downloading the Askiitians Toolbar respectively : Click here to download the toolbar..
Askiitians Expert
Sagar Singh
B.Tech, IIT Delhi
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