\( 254 \mathrm{~nm} \) p 4. Adjust the stopping potential of the battery so that it just barely stops the current. Notice that there are two Ohethods for adjusting the potential (The adjustment slider or typing in the number in the voltage box). Use the method that allows for greater precision. When the condition is met, electrons are ejected from the zinc and olmost make it to the opposite electrode. But they return to zinc, and the current remains zero. Record the minimum stopping potential for this wavelength.
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