In a Photoelectric Experiment, the Threshold Frequency for a Material

question 157

Multiple Choice

In a photoelectric experiment, the threshold frequency for a material is 3.2 × 10¹⁴ Hz. An electron ejected from this surface by a photon of frequency 9.4 × 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.

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