Final Prep Answers
Final Prep Answers
Final Prep Answers
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Chem 155 <strong>Final</strong> review topics and questions:<br />
20. Fill in the table to indicate what happens when HeNe laser radiation (wavelength<br />
= 632.8 nm) passes from air (n = 1) into glass (n = 1.6).<br />
Wavelength / nm Frequency /<br />
Air 632.8 4.74E14 1.96<br />
Glass 395.5 4.74E14 1.96<br />
s -1<br />
Energy / eV<br />
c<br />
c<br />
3.0010 8 m s<br />
632.810 9 m<br />
4.741 10 14 Hz<br />
632.8<br />
1.6<br />
395.5<br />
E<br />
h<br />
h c<br />
6.62610 34 J s 3.0010 8 m s<br />
632.810 9 m<br />
6.2410 18 eV J<br />
1.96eV<br />
21. How much light is reflected at normal incidence<br />
2 1.6 1 1.0 2 1<br />
2 1<br />
2<br />
100% 5.3%
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