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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A rectangular block of refractive index mu is placed on a printed page lying on a horizontal surface as shown in figure. Find the minimum value of mu so that the letter L on the page is not visible

A rectangular block of refractive index mu is placed on a printed page lying on a horizontal surface as shown in figure. Find the minimum value of mu so that the letter L on the page is not visible

A rectangular block of refractive index mu is placed on a printed page lying on a horizontal surface as shown in figure. Find the minimum value of mu so that the letter L on the page is not visible