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8. A rectangular block of glass is placed on a printed page lying on a horizontalsurface. The minimum value of the refractive index of glass for which theletters on the page are not visible from any of the vertical faces of block is(A) >V3(B) V2(C)> 1.55(D) 1.38

Answer» 8. A rectangular block of glass is placed on a printed page lying on a horizontalsurface. The minimum value of the refractive index of glass for which theletters on the page are not visible from any of the vertical faces of block is(A) >V3(B) V2(C)> 1.55(D) 1.38


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