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State the equation that relates the threshold wavelength (λ0), the wavelength of incident radiation (λ) and the maximum speed of a photo-electron (Vmax)

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\(\cfrac{hc}λ\) = \(\cfrac{hc}{λ_0}\) + \(\cfrac12\)mv2max is the required equation, where h is Planck’s constant, c is the speed of light in vacuum (free space) and m is the mass of the electron.

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