The threshold wavelengths for photoemission of two metals A and B are 300 nm and 600 nm, respectively. The ratio ΦA/ΦB of their photoelectric work functions is
A. \(\frac{1}{4}\)
B. \(\frac{1}{2}\)
C. 2
D. 4.
Answer:C
The threshold wavelengths for photoemission of two metals A and B are 300 nm and 600 nm, respectively. The ratio ΦA/ΦB of their photoelectric work functions is
A. \(\frac{1}{4}\) B. \(\frac{1}{2}\) C. 2 D. 4.