Tayannamorgan2373
31.08.2019 •
Physics
What is the work function of cadmium metal if light with = 9.85×1014hz is necessary to eject electrons?
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Ответ:
We use the Planck’s formula:
E = hv
where,
E = energy, h = planck’s constant = 6.6x10^-34 J s, v = frequency in Hz (Hz = 1 / s)
Subsituting the values to find for E:
E = (6.6×10^-34 J s) * 9.85×10^14 / s
E = 6.5x10^-19 J
Ответ:
212.5
Explanation: