AP EAMCET Engineering 2011 Solved Paper

Section: Physics

Question : 27 of 160

Marks: +1, -0

The focal length of a lens of dispersive power 0.45 which should be placed in contact with a convex lens of focal length 84cm and dispersive power 0.21 to make the achromatic combination from the two lenses, in cm is

45
90
180
−180

Validate

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