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blondinia [14]
3 years ago
15

Light with a wavelength of 5.0 · 10-7 m strikes a surface that requires 2.0 ev to eject an electron. Calculate the energy, in jo

ules, of one incident photon at this frequency.
_____ joules
Physics
2 answers:
GenaCL600 [577]3 years ago
7 0

6.2 x 10^-13 is your answer

Aleonysh [2.5K]3 years ago
7 0

Answer:The energy, in joules, of one incident photon at this frequency3.97\times 10^{-19} Joules.

Explanation:

The wavelength of the light = \lambda =5.0\times 10^{-7} m

Energy of a single photon is given by the expresssion:

E=\frac{hc}{\lambda }

h = Planck's constant

c = speed of light

E=\frac{6.626\times 10^{-34} J.s\times 3\times 10^8 m/s}{5.0\times 10^{-7} m}=3.97\times 10^{-19} Joules

The energy, in joules, of one incident photon at this frequency3.97\times 10^{-19} Joules.

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