A) \[\frac{{{r}_{3}}+{{r}_{1}}}{{{r}_{3}}-{{r}_{2}}}\]
B) \[\frac{{{r}_{3}}-{{r}_{1}}}{{{r}_{3}}-{{r}_{2}}}\]
C) \[\frac{{{r}_{3}}+{{r}_{2}}}{{{r}_{3}}-{{r}_{1}}}\]
D) \[\frac{{{r}_{3}}+{{r}_{2}}}{{{r}_{3}}+{{r}_{1}}}\]
Correct Answer: B
Solution :
[b] Actual thickness of the glass slab is \[t={{r}_{3}}-{{r}_{1}}\] Apparent thickness of the slab is \[t'={{r}_{3}}-{{r}_{2}}\] \[\therefore \,\,\,\,\,\,\,\,\mu =\frac{t}{t'}=\frac{{{r}_{3}}-{{r}_{1}}}{{{r}_{3}}-{{r}_{2}}}\]You need to login to perform this action.
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