AP EAMCET Engineering 2012 Solved Paper

Section: Physics

Question : 4 of 160

Marks: +1, -0

The dispersive powers of the materials of two lenses forming an achromatic combination are in the ratio of 4:3. Effective focal length of the two lenses is +60cm then the focal lengths of the lenses should be

−20cm,25cm
20cm,−25cm
−15cm,20cm
15cm,−20cm

Validate

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