We shine light of three different wavelengths325 nm, 455 nm, and 632 nmon a metal surface and

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We shine light of three different wavelengths—325 nm, 455 nm, and 632 nm—on a metal surface and record the following observations for each wavelength, labeled A, B, and C:

Observation A: No photoelectrons were observed.

Observation B: Photoelectrons with a kinetic energy of 155 kJ/mol were observed.

Observation C: Photoelectrons with a kinetic energy of 51 kJ/mol were observed.

Which observation corresponds to the 325 nm light?

(a) Observation A 

(b) Observation B 

(c) Observation C

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