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Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsTIR/Prism and DispersionMedium2 minQB

PhysicsMediumsingle choice

An achromatic convergent doublet of two lens in contact has a power of $+ 2$ D. The convex lens has power $+ 5$ D. What is the ratio of the dispersive powers of the convergent and divergent lenses?

Options:

Answer:

Solution:

$P_{1} = + 5$ D, $P_{2} = 2 - 5 = - 3$ D

Achromatic: $ω_{1} P_{1} + ω_{2} P_{2} = 0$

$\frac{ω _{1}}{ω _{2}} = - \frac{P _{2}}{P _{1}} = \frac{3}{5}$

Stream:JEESubject:PhysicsTopic:Geometrical OpticsSubtopic:TIR/Prism and Dispersion

⏱ 2mℹ️ Source: QB

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