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PhysicsModern PhysicsPhotoelectric effectMedium2 minPYQ_2002

PhysicsMediumstatement

Sodium and copper have work functions $2.3 eV$ and $4.5 eV$ respectively. Then the ratio of the wave lengths is nearest to

Answer:

Solution:

$hc / λ_{0} = W_{0}; \frac{( λ _{0} ) _{1}}{( λ _{0} ) _{2}} = \frac{( W _{0} ) _{2}}{( W _{0} ) _{1}} = \frac{4.5}{2.3} = 2 : 1$

Stream:JEESubject:PhysicsTopic:Modern PhysicsSubtopic:Photoelectric effect

⏱ 2mℹ️ Source: PYQ_2002

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