Millionaire Mode

Power of the lens - class-XII

Question 1 of 57

Two thin lenses of focal length $f _1$ and $f _2$ are in contact and coaxial. The power of the combination is

  1. $\sqrt{\frac{f _1}{f _2}}$
  2. $\sqrt{\frac{f _2}{f _1}}$
  3. $\frac{f _1+f _2}{f _1f _2}$
  4. $\frac{f _1-f _2}{f _1f _2}$

Prize Money

15₹7 Crores
14₹1 Crore
13₹50,00,000
12₹25,00,000
11₹12,50,000
10₹6,40,000
9₹3,20,000
8₹1,60,000
7₹80,000
6₹40,000
5₹20,000
4₹10,000
3₹5,000
2₹2,000
1₹1,000