1.

For a given optical system, the principal axis is x-axis and coordinates of object are (-30,+1,0) and coordinates of image are (+20,-2,0) All coordinates are in cm. If the optical system is a spherical refracting surface, its centre of curvature is at what point?

Answer»

`-15` CM
`+25` cm
`(-40)/3` cm
`-80` cm

Solution :LINE passing through CENTRE passes undeviated

`30-50/3=40/3`


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