QJEEM22Phf943: JEE Main 2022 Physics - Class 12 JEEM22Phf943 Solution: Let K 1 and K 2 be the maximum kinetic energies of…

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QJEEM22Phf943: JEE Main 2022 Physics - Class 12 JEEM22Phf943 Solution: Let K 1 and K 2 be the maximum kinetic energies of…

Let K₁ and K₂ be the maximum kinetic energies of photo-electrons emitted when two monochromatic beams of wavelength $λ$ ₁ and $λ$ ₂, respectively are incident on a metallic surface. If $λ$ ₁ = 3 $λ$ ₂ then :

Multiple Choice Options

A K1>K23
B K1
C K1=K23
D K2=K13

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Accepted Answer

$K_{1} = \frac{h c}{λ_{1}} - ϕ = \frac{h c}{3 λ_{2}} - ϕ$ ..... (i)

and $K_{2} = \frac{h c}{λ_{2}} - ϕ$ ..... (ii)

from (i) and (ii) we can say

$3 K_{1} = K_{2} - 2 ϕ$

$K_{1} < \frac{K_{2}}{3}$

QJEEM22Phf943: JEE Main 2022 Physics - Class 12 JEEM22Phf943 Solution: Let K 1 and K 2 be the maximum kinetic energies of…

Multiple Choice Options

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