Multiple Choice
If barium has a work function of 2.6 eV,what is its cutoff wavelength when used as a phototube target? (h = 6.63 × 10−34 J⋅s,c = 3.00 × 108 m/s,1 eV = 1.60 × 10−19 J and 1 nm = 10−9 m)
A) 765 nm
B) 478 nm
C) 777 nm
D) 380 nm
Correct Answer:
Verified
Correct Answer:
Verified
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