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A point luminous object (O) is at a distance h from front face of a glass slab of width d and of refractive index mu. On the back face of slab is a refracting plane mirror. Anobserver sees the imageof object in mirroras shown in figure. Distance of image from front face as seen by observerwill be |
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Answer» `h+ (2d)/(mu)` Now asa plane mirror formsimage behind the mirrorat the samedistanceas the objectis in forntof it, the DISTANCEOF imageI form `mm'`will be `h + (d/u)` and as thedistance of vir tualmirror from the front face as seen by observer `=[h+(d)/(mu)] + (d)/(mu) = h + (2d)/(mu)` 
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