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Use the Energy Levels for Hydrogen to calculate the wavelength corresponding to the following electron transition

Transition Energy in ev's Emitted wavelengths in m

2->1______ ________x10______

- Thread starter whiteshado
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Use the Energy Levels for Hydrogen to calculate the wavelength corresponding to the following electron transition

Transition Energy in ev's Emitted wavelengths in m

2->1______ ________x10______

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quasar987

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[tex]E=hf[/tex]

where f is the frequency of the photon. How are frequency and wavelenght related?

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- #5

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well speed of sound divided by wavelength =frequency

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is taht what you were asking for?

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A photon travels at the speed of _____

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hf is the energy of the radiated photons

thats all i got

thats all i got

- #9

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c = (Frequency)(Wavelength) should give you its wavelength. All you ahve to do is find the energy drop from 2->1 and solve this equation and plug it into the E = hF one.

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quasar987

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This is also true for light. Light is a wave too, and a "photon" is only a fancy name we give to "little chuncks" (quanta!) of light.whiteshado said:well speed of sound divided by wavelength =frequency

So speed of light divided by wavelength =frequency.

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k so correct me if im wrong 2-1 =-13.6 evs and w =-13.6evs/6.63e-34

?

?

- #12

quasar987

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-13.6 eV is the energy the electronwhiteshado said:k so correct me if im wrong 2-1 =-13.6 evs and w =-13.6evs/6.63e-34

?

You're looking for the energy it has

[tex]\Delta E = E_f - E_i[/tex]

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12.2? is that it? nope it was 10.2

Last edited:

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quasar987

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yeah.

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hmm i got 1.15e53

10.2/1.6e-19/6.63e-34

its not right thought i think i missed soemthing

wait is this is my freqwuancy correcT?

10.2/1.6e-19/6.63e-34

its not right thought i think i missed soemthing

wait is this is my freqwuancy correcT?

Last edited:

- #16

quasar987

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Same thing here: 1 eV = 1.6*10^19 J, so 12.2 eV = 12.2*1.6*10^-19 J.

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ahhh i devided instead of multiplying

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jtbell

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[tex]\frac {10.2 eV} {4.14 \times 10^{-15} eV \cdot seconds} [/tex]

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=f=594574507617985878855444072835.38 correct?\jtbell said:

[tex]\frac {10.2 eV} {4.14 \times 10^{-15} eV \cdot seconds} [/tex]

then speed of light/f=w

299 792 458/594574507617985878855444072835.38=5.04e-22

taht still doesnt give me the correct answer the correct answer is 1.22e-7

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Nope.It should be ~2.5 10^{15}Hz...And the wavelength ~1.22 10^{-7}m.

Daniel.

Daniel.

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ahh yes by useing Planck's constant in its original form thanks for the help again guys

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though my graph shows the infinity sign and a 0.0 for where lvl 6 should be could i get the energy lvl of lvl 6 from someone? or how to get it

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Daniel.

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i did do taht after i posted and tried useing the constant in ev form

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Gokul43201

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How is [itex]E_n[/itex] related to [itex]E_1 = -13.6~eV[/itex] ?whiteshado said:

though my graph shows the infinity sign and a 0.0 for where lvl 6 should be could i get the energy lvl of lvl 6 from someone? or how to get it

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