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  4. A glass slab (μ=1.5) of thickness 2 cm is placed on a spot. The shift of spot if it is viewed from top

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Q. A glass slab $(\mu=1.5)$ of thickness $2 \,cm$ is placed on a spot. The shift of spot if it is viewed from top

Ray Optics and Optical Instruments

Solution:

Shift $=t\left(1-\frac{1}{\mu}\right)$
$=2\left(1-\frac{1}{1.5}\right)$
$=\frac{2}{3} \,cm$