Element Work Function (eV) Aluminum 4.3 Carbon 5.0 Copper 4.7 Gold 5.1 Nickel 5.1 Silicon 4.8 Silver 4.3 Sodium 2.7
Element Work Function (eV) Aluminum 4.3 Carbon 5.0 Copper 4.7 Gold 5.1 Nickel 5.1 Silicon 4.8 Silver 4.3 Sodium 2.7
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When ultraviolet light with a wavelength of 254 nm falls on a clean copper surface, the stopping potential necessary to stop emission of photoelectrons is 0.181 V. (a) What is the photoelectric threshold wavelength for this copper surface? (b) What is the work function for this surface, and how does your calculated value compare with that given in Table
Transcribed Image Text:Element
Work Function (eV)
Aluminum
4.3
Carbon
5.0
Copper
4.7
Gold
5.1
Nickel
5.1
Silicon
4.8
Silver
4.3
Sodium
2.7
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