20. IE The work function of metal A is less than that of metal B. (a)...

Question:

20. IE •• The work function of metal A is less than that of metal B.

(a) The threshold wavelength for metal A is

(1) shorter than, (2) the same as, (3) longer than that of metal B. Why?

(b) If the threshold wavelength for metal B is 620 nm and the work function of metal A is twice that of metal B, what is the threshold wavelength for metal A?

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