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A glass sphere of refractive index 1.5 has a diameter of 0.2m. A parallel beam is incident on the sphere. Where is it brought to focus by the sphere ? |
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Answer» SOLUTION :Formula `: ( n_(1) ) /( u ) + ( N _(2))/( V) = ( n_(1) ~ n_(2))/( R)` For REFRACTION at `1^(st)` SURFACE, `u = oo, v = v.` `(1)/( oo) + ( 1.5)/( v ) = ( 1.5-1)/( 0.1)` `v. = ( 1.5)/( 5) = 0.3m` For refraction at `2^(nd)` surface, `( -1.5)/( 0.1) +( 1)/( v) = (1.5-1)/(0.1)` |
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