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Chapter 20: Q2 TY (page 509)
Visible light strikes the surface of benzene at a angle. At what angle does the light ray pass through the benzene?
The angle of light ray passed through the benzene is .
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Consider a reflection grating operating with an incident angle of 408 in Figure 20-7. (a) How many lines per centimeter should be etched in the grating if the first-order diffraction angle for 600 nm (visible) light is to be 2308? (b) Answer the same question for 1 000 cm21 (infrared) light.
What are the advantages and disadvantages of decreasing monochromator slit width?
In Figure 20-35, the relative detection limit is 37 after 1sof signal averaging, 12.5 after 10s, and 5.6 after 40 sof signal averaging. Based on the value of 37 at 1 s, what are the expected detection limits at 10 sand 40 sin an ideal experiment?
Would you use a tungsten or a deuterium lamp as a source of 300-nm radiation? What kind of lamp provides radiation at 4-mm wavelength?
The variation of refractive index, n, with wavelength for fused silica is given by
where is expressed in .
(a) Make a graph of n versus with points at the following wavelengths: 0.2,0.4,0.6,0.8,1,2,3,4,5, and .
(b) The ability of a prism to spread apart (disperse) neighboring wavelengths increases as the slope increases. Is the dispersion of fused silica greater for blue light or red light?
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