Consider a metal exposed to light of wavelength 600 nm

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dual-nature

#1

Consider a metal exposed to light of
wavelength 600 nm. The maximum energy of the electron doubles when light of wavelength 400 nm is used. Find the work function in eV.


#2

Given, for the first condition,
Wavelength of light, λ = 600
Wavelength of light, λ’ = 400 nm
Also, maximum kinetic energy for the second condition is equal to the twice of the kinetic energy in first condition, then,