The displacement d produced in a glass block of thickness t and refractive index n when an object is viewed through it is
-
A.
t – n -
B.
t (1 + 1/n) -
C.
t (1-1/n) -
D.
t (1/n – 1)
Correct Answer: Option C
Explanation
n = (frac {text{real depth}}{text {apparent depth}{}})
n = (frac {t}{t-d})
(frac{t – d}{1}) = (frac{t}{n})
-d = (frac{t}{n}) – t
d = – (frac{t}{n}) + t
d = t – (frac{t}{n})
d =t (1 – (frac{1}{n}))