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One end of a cylindrical glass rod (mu = 1.5) is given the shape of a concave refracting surface of radius 10cm. An air bubble is situated in the glass rod at a point on its axis such that it appears to be at distance 10 cm from the surface and inside glass when seen from the other medium. Find the actual location of air bubble. |
Answer» Solution :Using ` (mu_2 )/(v ) - (mu_1)/(U) =(mu_2 -mu_1)/(R )`  ` mu_1= 1.5 ,mu_2 =1` `v=-10CM, R= +10cm` ` therefore -(1)/(10) - (1.5 )/(u ) = (1-1.5 )/(10) =-(1)/(20)` `(1.5 )/(u ) =-(1)/(10 )+(1)/(20) =-(1)/(20)` ` thereforeu=-30 CM` Hence the air BUBBLE is actually located at a distance 30cm from the surface and INSIDE glass. |
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