The focal lengths of convex lens for red and blue light are 100 cm and – McqOptions

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1.	The focal lengths of convex lens for red and blue light are 100 cm and 96.8 cm respectively. The dispersive power of material of lens is [Pb. PET 2003]
A.	0.325
B.	0.0325
C.	0.98
D.	0.968
Answer» C. 0.98

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