Calculate the energy for Red, Blue and Purple.?

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Calculate the energy for Red, Blue and Purple.?

My teacher asked us to calculate the energy for Red, Blue, and Purple. I'm not sure what to do. =/

2007-10-11 04:00:46 · 1 answers · asked by Vanessa1027 1 in Science & Mathematics ➔ Chemistry

1 answers

First you must give the wavelength call this L

the energy is E =hc/L

h=6.62*10^-34 Js c = 3*10^8 m/s L must be in meter
I give you a reasonable (for one photon)
estimating for red L = 700nm=7*10^-7m

e= 6.62*10^-34*3*10^8/7*10^-7=2.84*10^-19J

2007-10-11 04:20:30 · answer #1 · answered by maussy 7 · 0⤊ 0⤋