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A Converging Beam of Light Travelling in Air Converges at a Point P as Shown in the Figure. When a Glass Sphere of Refractive Index 1 . 5 is Introduced in Between the Path of the Beam, - Physics

Numerical

A converging beam of light travelling in air converges at a point P as shown in the figure. When a glass sphere  of refractive index 1 . 5 is introduced in between the path of the beam, calculate the new position of the image. Also draw the ray diagram for the image formed.

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Solution

Case 1 : n1 = 1 n2 = 1.5 

u = ∞

   

`1.5/V = 1/ ∞ = ((1.5 - 1))/5` 

`1.5/V = 0.5/5`

V = 15 cm 

case 2 : 

`1/V - 1.5/15 = (1-1.5)/-5`

`1/V = 0.5/5 + 1.5/15`

`1/V = 1/20`

V = 20 cm 

Concept: Refraction
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