Violet Light (λ = 430 Nm)is Incident on a Piece

question 25

Multiple Choice

Violet light (λ = 430 nm) is incident on a piece of potassium (φ = 2.20 eV) .What is the maximum kinetic energy of the ejected photoelectrons? (h = 6.63 × 10−³⁴ J⋅s,c = 3.00 × 10⁸ m/s,1 eV = 1.60 × 10−¹⁹ J,and 1 nm = 10−⁹ m)

• A)2.43 eV
• B)0.69 eV
• C)2.89 eV
• D)5.09 eV
• E)​0.96 eV

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