The threshold frequency for a photosensitive metal is 3.3 × 10¹⁴ Hz. If light of frequency 8.2 × 10¹⁴Hz is incident on this metal, the cut-off voltage for the photoelectric emission is nearly ______
A. 1 V
B. 2 V
C. 3 V
D. 5 V
Answer:B
The threshold frequency for a photosensitive metal is 3.3 × 10¹⁴ Hz. If light of frequency 8.2 × 10¹⁴Hz is incident on this metal, the cut-off voltage for the photoelectric emission is nearly ______
A. 1 V B. 2 V C. 3 V D. 5 V