For a certain metal surface the threshold frequency is

PHYSICS · Single correct · A Level · Physics · Particles and radiation · Particles and radiation

Problem

For a certain metal surface the threshold frequency is 4.5×1014 Hz4.5\times10^{14}\,\text{Hz}. What is its threshold wavelength λ0\lambda_0? (a) 4.5×10−7 m4.5\times10^{-7}\,\text{m} (b) 6.7×10−7 m6.7\times10^{-7}\,\text{m} (c) 1.1×10−7 m1.1\times10^{-7}\,\text{m} (d) 6.7×10−8 m6.7\times10^{-8}\,\text{m}

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