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An air bubble inside a glass slab (µ=1.5...

An air bubble inside a glass slab (µ=1.5) appears 6 cm when viewed from one side and 4 cm when viewed from the opposite side. The thickness of the slab is

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The correct Answer is:
15 cm
`(x_(1))/(mu) = 6 therefore x_(1)= 6 xx (3)/(2)` and `(x_(2))/(mu) = 4 , x_(2) = 4 xx (3)/(2)`
`therefore t = x_(1) + x_(2) = 6 + 9 = 15 cm`
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ALLEN -GEOMETRICAL OPTICS-EXERCISE-04[A]
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