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Locate the image formed by refraction in...

Locate the image formed by refraction in the situation shown in figure. The point C is the centre of curvature

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We have
`mu_2/v-mu_2/u=(mu_2-mu_1)/R`…..i
Here `u=-25cm, R=20 cm , mu_1=1.0 and mu_2=1.5`
Putting the values in i
`1.5/v=1/(40cm)-1/(25cm)`
`or v=-100cm`
As v is negative the image is formed to the left of the separating surface at a distance of 100 cm from it.
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