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?
-
\(\frac{d}{n}\)
- dn
- \(\frac{d}{n - 2}\)
- \(\frac{d(n - 1)}{n}\)
The correct answer is: A
Explanation
n = \(\frac{R.d}{A.d}\)R.d = \(\frac{R.d}{n} = \frac{d}{n}\)