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PhysicsModern PhysicsPhotoelectric effectEasy2 minPYQ_2023

PhysicsEasystatement

If the two metals $A$ and $B$ are exposed to radiation of wavelength $350 nm$ . The work functions of metals $A$ and $B$ are $4.8 eV and 2.2 eV$ . Then choose the correct option

Options:

Answer:

Solution:

As we know, for photoelectric emission, $h ν > ϕ$ .

Now,

$h ν = \frac{h c}{λ} = \frac{1240}{350} eV = 3.54 eV$

Therefore, only metal $B$ will emit photoelectrons.

Stream:JEESubject:PhysicsTopic:Modern PhysicsSubtopic:Photoelectric effect

⏱ 2mℹ️ Source: PYQ_2023

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