TS EAMCET · Physics · Ray Optics
A convex lens with lateral magnification 2 is used to image a point at the bottom of a tank. The image of the point is formed \(60 \mathrm{~cm}\) above the lens. Now a liquid is filled into the tank to a height of \(24 \mathrm{~cm}\). It is found that the distance of the image of the same point is now \(120 \mathrm{~cm}\) above the lens. Find the refractive index of the liquid.
- A 1.31
- B 1.33
- C 1.36
- D 1.39
Answer & Solution
Correct Answer
(B) 1.33
Step-by-step Solution
Detailed explanation
The given situation is shown below. Let \(u_1=\) initial object distance from lens \(f=\) focal length of lens \(v_1=60 \mathrm{~cm}\) (initial image distance) \(m=2\) (lateral magnification) Using, \(m=-\frac{v_1}{u_1}=2\)…
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