Light of wavelength lambda(A) and lambda...

Light of wavelength `lambda_(A)` and `lambda_(B)` falls on two identical metal plates A and B respectively . The maximum kinetic energy of photoelectrons in `K_(A)` and `K_(B)` respectively , then which one of the following relations is true ? `(lambda_(A) = 2lambda_(B))`

`K_(A) lt (K_(B))/(2)`

`2 K_(A) = K_(B)`

`K_(A) = 2 K_(B)`

`K_(A) gt 2K_(B)`

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