An electron falls from an energy level of -5.44eV to another energy level, E. If the emitted photon is of wavelength 5.68 x 10\(^{-6}\)m, calculate the energy change. [ Plank's constant = 6.63 x 10\(^{-34}\)Js, emitted radiation speed = 3.0 x 10\(^8\)ms\(^{-1}\)]

a

1.49 x 10\(^{-20}\)J

b

1.49 x 10\(^{-19}\)J

c

3.49 x 10\(^{-20}\)J

d

3.49 x 10\(^{-19}\)J

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Correct Option
c

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Discussions (10)

Emmanuel24458
1 year ago

they just put the energy transition to confuse 😩😒

Odemosad
1 year ago

Jst make use of E = HF
Noting that f = v/wavelength

igbochristabel
1 year ago

pls how does the answer hv -20 instead of -19
pls someone explain

olorunjedacoker
1 year ago

i got 3.50×10^20

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