In a Photoelectric Experiment,the Threshold Frequency for a Material Is $\times$

Multiple Choice

In a photoelectric experiment,the threshold frequency for a material is 3.2 $\times$ 10¹⁴ Hz.An electron ejected from this surface by a photon of frequency 9.4 $\times$ 10¹⁴ Hz can be stopped by a stopping potential of

A) 8.5 mV
B) 1.6 V
C) 0.26 nV
D) 2.6 V
E) 3.6 kV