The emitted wavelengths of an element can be related to thefrequency and energy

Question

The emitted wavelengths of an element can be related to thefrequency and energy of emission. The emissions from the hydrogenatom were modeled using the Rydberg equation, which Niels Bohr usedto develop the Bohr model of the atom.

Visit the website: http://jersey.uoregon.edu/vlab/elements/Elements.html.Click on the "Emission " icon to change the display to emissionspectra. Select the element Helium (He).Please give the wavelength in Angstroms, frequency and energy ofthe yellow emission. Place the cursor onemission line and hold down the mouse button to display thewavelength of that line in Angstroms (1 Angstrom = 0.1 nm =1x10-10 m).

(Please enter your answers using the e-format for exponentials. Forexample, 2.53x1012 would be expressed as 2.53e12. Do notuse preceeding zeros in the exponent, e.g. 1.3e-5, not 1.3e-05.Avoid the use of spaces in the entry, e.g. 1.3e-5, not 1.3e-5.)

wavelength
1Angstroms
frequency
2sec-1
energy
3 J

wavelength
1Angstroms
frequency
2sec-1
energy
3 J

Explanation / Answer

the yellow emmision which is 587 nm wavlength 587 nm = 5870 angstroms frequency 3e8/5.87e-7=5.11073e14 e=hv 6.626e-34*4.918e14= 6.626e-34*5.11073e14=3.38637e-19

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