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If the wavelength is brought down from $6000 Å$ to $4000 Å$ in a photoelectric experiment then what will happen?
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The correct answer is:
Cut off voltage will increase
When wavelength decreases, frequency increases. Also, we know that cut-off voltage (or stopping potential) increases when frequency increases.
Hence, option (d) is correct. Note that work function and threshold frequency are constant for a given metal.
Hence, option (d) is correct. Note that work function and threshold frequency are constant for a given metal.
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