An object is placed 30cm from reflecting surface in front of a block of glass 10 cm thick having it's farther side silvered. The final image is formed 23.2 cm behind the silvered face. The refracting index of glass is :
1
Expert's answer
2019-07-29T08:23:09-0400
The refractive index of glass n is equal to
"n = \\frac{r}{a} (1)"
where r is real depth, a is the apparent depth
In our case, r=30 cm
The silvered surface act as a mirror and we can write
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