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CBSE Class 12-science Answered

In the cases of lens, all distances are measured from the pole. So they have a direction. But they are not vectors why??
Asked by advssdrall | 30 Oct, 2022, 10:06: AM
answered-by-expert Expert Answer
Sign-convention , for example , cartesian sign convention is used to have single equation for concave and convex reflecting/refracting  surfaces.
 
Same mirror equation is used for convex and concave mirror but distances have respective sign.
 
Similarly , same Lens equation is used for concave and convex lens , but distances have respective sign.
 
Sign of the distances is considered only for the direction of measurement and no mechanics is involved.
 
hence , though optical distances have sign and magnitude , they are not vectors
Answered by Thiyagarajan K | 30 Oct, 2022, 12:59: PM

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CBSE 12-science - Physics
In the cases of lens, all distances are measured from the pole. So they have a direction. But they are not vectors why??
Asked by advssdrall | 30 Oct, 2022, 10:06: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
by starting sign conventions and assumptions used derive the relation between u, v and f in case of concave mirror
Asked by upasonamandal7 | 31 Jan, 2022, 10:35: AM
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CBSE 12-science - Physics
by starting sign conventions and assumptions used derive the relation between u,v and f in case of concave mirror
Asked by upasonamandal7 | 28 Jan, 2022, 10:15: AM
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CBSE 12-science - Physics
The interior of a hollow metal sphere is polished to serve as a mirror. At a point 12cm from the centre of the sphere of radius 24 cm, a point source of light is placed. Locate its image formed by two successive reflections, the first reflection taking place at the  (a) far wall (b) near wall. 
Asked by mridulabarua05 | 08 Feb, 2019, 10:04: AM
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CBSE 12-science - Physics
For a spherical refracting surface define:a. Pole  b. Centre of curvature c. Principle axis
Asked by Topperlearning User | 21 May, 2014, 01:45: PM
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CBSE 12-science - Physics
A convex refracting surface f radius of curvature 20 cm separates two media of refractive indices 4/3 and 1.60. An object is placed in the first medium (n = 4/3) at a distance of 200 cm from the refracting surface. Calculate the position of the image formed.
Asked by Topperlearning User | 09 May, 2014, 12:59: PM
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CBSE 12-science - Physics
The radius of curvature of convex surface is 10 cm and if an object lies at a distance of 20 cm from it in the rarer medium, find the position of the image assuming the refractive index of the rarer medium is 1.0, while that of the denser medium is 2.0.
Asked by Topperlearning User | 09 May, 2014, 01:35: PM
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CBSE 12-science - Physics
A small piece of paper stuck on a glass sphere of 5 cm radius is viewed through the glass from the position directly opposite. Find the position of the image. Refractive index of glass is 1.5
Asked by Topperlearning User | 13 May, 2014, 01:44: PM
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CBSE 12-science - Physics
A point object is placed in air at distance of 40 cm from a concave refracting surface of refractive index 1.5. If radius of curvature of the spherical surface is 20 cm, calculate the position of the image.
Asked by Topperlearning User | 09 May, 2014, 03:46: PM
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CBSE 12-science - Physics
<div>Explain me ray tracing of concave lens??</div>
Asked by Mohdabrar | 19 Feb, 2016, 02:27: AM
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