Ray Optics and Optical Instruments

Question: A achromatic combination is made with a lens of focal length $f$ and dispersive power $\omega $ with a lens having dispersive power of $2\omega $. The focal length of second will be

1) $2 f$

2) $f/2$

3) $-f/2$

4) $– 2 f$

Solution:

Explanation: No Explanation

Refraction at Curved Surface

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