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A​ parallel beam of light enters a clear plastic bead 2.5cm diameter and refractive index of 1.44 . The point beyond the bead these is focused is ​

A​ parallel beam of light enters a clear plastic bead 2.5cm diameter and refractive index of 1.44 . The point beyond the bead these is focused is

Grade:12th pass

2 Answers

Nitesh Narayana
27 Points
5 years ago
ITS FOCUSED AT .6336cm from the centre. first the convex side of the bead focuses it at 2.045cm from centre this acts as object for the concave side of the bead which in the end focuses on .6336cm
Shardul
16 Points
2 years ago
The correct answer is 0.795 cm. 
Using formula of refraction by spherical lenses , it becomes easy to get answer. 
Kuldeep Kumar 
Air 56 in jee 2017
 

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