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According to Einstein's photoelectric equation, eV = hc / λ - hc / λ₀. If eV / 4 = hc / 2λ - hc / λ₀, solve for λ₀.

1. λ₀ = 3λ
2. λ₀ = 2λ
3. λ₀ = λ
4. None of the above

Correct answer: λ₀ = 3λ

Solution

Rewriting the given equations and solving step-by-step, we find that λ₀ = 3λ. This involves equating the two expressions for eV and simplifying to isolate λ₀ in terms of λ.

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