0015 1spectra

Generating Atomic Line Spectra

An Introduction to Atomic Structure and Spectroscopy

Click on the tabs to navigate!!!

Behavior of Light

Change the color of the visible light How are the wavelength and energy of light related? by dragging the scroll bar to the right

64

violet red

wavelength

0 0

50 0.704168 Wavelength

100 0.999966 400 nm

150 0.715851

200 0.016592 Energy

250 -0.69229 4.97E-12 erg

300 -0.99969 350 -0.72734 400 -0.03318 450 0.680221 500 0.99914 550 0.738625 600 0.049757

650 -0.66797 0 0

700 -0.99831 400 0

750 -0.74971 800 -0.06632

850 0.655526The white bar on the x-axis is the wavelength of the light wave.

900 0.997214Wavelength is measured in nanometers, nm (1 nm = 10^-9 m).

950 0.760585 1050 -0.64291

 nm

0 100 200 300 400 500 600 700 800 900 1000

Hydrogen's Spectrum Check the rescale box and electron transition

then click the up arrow. 3 2 ---> 4 electron excited to higher energy level

Absorption Spectra energy absorbed

Emission Spectra  = 486.1 nm

FALSE n = 2

n = 3 n = 4 n = 5 n = 6

-4 -3.5 -3 -2.5 -2 -1.5 -1 -0.5 0

energy, eV

rescale (remove n = 1)

400 450 500 550 600 650 700

wavelength, nm

400 450 500 550 600 650 700

wavelength, nm

show all spectral lines on both spectra

The Spectra of Other Elements

How do different elements compare?

Select an Element

He Hg Sr TRUE

402.636 402.636 0 404.656 -100 0 407.771 -100 0

447.148 447.148 0 435.833 -100 0 421.552 -100 0 FALSE

501.568 501.568 0 546.074 -100 0 460.733 -100 0

587.562 587.562 0 576.96 -100 0 496.226 -100 0 FALSE

587.597 587.597 0 578.966 -100 0 548.084 -100 0

667.815 667.815 0 614.95 -100 0 640.847 -100 0 FALSE

650.4 -100 0

FALSE

Recommend one at a time.

Selected intense lines for each element!

Do you think that each element has a spectral fingerprint? Why or why not?

Helium

400 450 500 550 600 650 700

wavelength, nm

Mercury

Strontium Krypton Barium