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Solution: The binding energy of an electron in iron is 7.49 × 10 –19 J. What is the maximum wavelength of light that can be used to eject electrons from iron? A) 265 nm B) 636 nm C) 542 nm D) 339 nm E) 800 nm

Problem

The binding energy of an electron in iron is 7.49 × 10 –19 J. What is the maximum wavelength of light that can be used to eject electrons from iron?

A) 265 nm

B) 636 nm

C) 542 nm

D) 339 nm

E) 800 nm