Two identical photo-cathodes receive light of frequencies f1 and f2. If the velocities of the photo electrons of mass m coming out are respectively V1 and V2. Then:
A. V1 – V2 = \(\left[\frac{2 h}{m}\left(f_{1}-f_{2}\right)\right]^{1 / 2}\)
B. V12 – V22 = \(\frac{2 h}{m}\left(f_{1}-f_{2}\right)\)
C. V1 + V2 = \(\left[\frac{2 h}{m}\left(f_{1}+f_{2}\right)\right]^{1 / 2}\)
D. V12 + V22 = \(\frac{2 h}{m}\left(f_{1}+f_{2}\right)\)
Answer:B
Two identical photo-cathodes receive light of frequencies f1 and f2. If the velocities of the photo electrons of mass m coming out are respectively V1 and V2. Then:
A. V1 – V2 = \(\left[\frac{2 h}{m}\left(f_{1}-f_{2}\right)\right]^{1 / 2}\) B. V12 – V22 = \(\frac{2 h}{m}\left(f_{1}-f_{2}\right)\) C. V1 + V2 = \(\left[\frac{2 h}{m}\left(f_{1}+f_{2}\right)\right]^{1 / 2}\) D. V12 + V22 = \(\frac{2 h}{m}\left(f_{1}+f_{2}\right)\)