The displacement d produced in a glass block of thickness t and refractive index n...
PHYSICS
JAMB 1998
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
- B. t (1 + 1/n)
- C. t (1-1/n)
- D. t (1/n - 1)
Correct Answer: C. t (1-1/n)
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 - \(\frac{1}{n}\))
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