question_answer

A rectangular block of glass is placed on a mark made on the surface of the table and it is viewed from the vertical position of eye. If refractive index of glass be \[\mu \] and its thickness d, then the mark will appear to be raised up by

A)  \[\frac{(\mu +1)}{\mu }\]           

B)         \[\frac{(\mu -1)d}{\mu }\]           

C)  \[\frac{(\mu -1)d}{\mu d}\]      

D)         \[\frac{(\mu -1)\mu }{d}\]