JEE Main & Advanced
JEE Main Paper (Held On 25 April 2013)
question_answer
A printed page is pressed by a glass of water. The refractive index of the glass and water is 1.5 and 1.33, respectively. If the thickness of the bottom of glass is 1 cm and depth of depth of water is 5 cm, how much the page will appear to be shifted if viewed from the top?
JEE Main Online Paper ( Held On 25 April 2013 )
A)1.033 cm
B)3.581 cm
C)1.3533 cm
D)1.90 cm
Correct Answer:
C
Solution :
Real depth = 5 cm + 1 cm = 6cm Apparent depth\[=\frac{{{d}_{1}}}{{{\mu }_{1}}}+\frac{{{d}_{2}}}{{{\mu }_{2}}}+....\]\[=\frac{5}{1.33}+\frac{1}{1.5}\] \[=3.8+0.7=4.5cm\] \[\therefore \]\[\text{Shift}=6cm-4.5cm\cong 1.5cm\]