A rectangular glass prism of thickness d and absolute refractive index n is placed on a point object which is viewed vertically downward from above the prism. Which of the following expressions correctly defines the apparent upward displacement of the object?
-
A.
(frac{d}{n}) -
B.
dn -
C.
(frac{d}{n – 2}) -
D.
(frac{d(n – 1)}{n})
Correct Answer: Option A
Explanation
n = (frac{R.d}{A.d})
R.d = (frac{R.d}{n} = frac{d}{n})