The next three questions pertain to the situation described below. In a photoelectric effect experiment, light from a bl

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The Next Three Questions Pertain To The Situation Described Below In A Photoelectric Effect Experiment Light From A Bl 1 (78.65 KiB) Viewed 15 times

The next three questions pertain to the situation described below. In a photoelectric effect experiment, light from a blue LED (wavelength = 405 nm) is directed onto a piece of sodium. It is observed that when V = 0.52 volts, the current measured at the collector drops to zero. Collector ] elektrons! Sodium *** 13) What is the work function of the sodium? a. 3.6 eV b. 2.5 eV c. 0.85 eV d. 1.6 eV e. 0.088 eV 14) What is the highest velocity of an ejected electron, just above the surface of the sodium? a. 4.3 x 103 m/s b. 6.8 x 103 m/s c. 3 x 105 m/s 15) Now we decrease the power of the LED, keeping the wavelength fixed. Which of the following statements is true? a. The maximum velocity of any ejected electrons will decrease. b. The minimum possible time to eject an electron (relative to when the LED is turned on) will increase. c. The bias voltage required to stop the current to the collector will stay the same.