diffraction gratings - South Central

Question

The spiral grooves on a compact disk make them act as these devices, explaining their iridescence. For 10 points each:

[10m] Name these devices that, like prisms, are commonly used to separate light in a monochromator.

ANSWER: diffraction gratings

[10e] A grating prism combination called a grism keeps only light of a specific value of this quantity undeviated. This quantity symbolized lambda equals wave speed over frequency.

ANSWER: wavelength

[10h] This type of diffraction grating is grooved at a namesake angle to maximize diffraction in a specific order. A specific type of these gratings are used in the HARPS (“harps”) spectrograph for exoplanet hunting.

ANSWER: blazed gratings [or echellette (“eh-shell-ET”) gratings; accept blaze angle; accept echelle (“eh-SHELL”) gratings]

<Purdue, Physics>

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California (North)	Main Site	Y	3	16.67	100%	67%	0%
California (South)	Main Site	Y	4	12.50	100%	25%	0%
Canada	Main Site	Y	12	12.50	100%	17%	8%
Florida	Main Site	Y	3	10.00	100%	0%	0%
Great Lakes	Main Site	Y	5	22.00	100%	80%	40%
Lower Mid-Atlantic	Main Site	Y	9	10.00	89%	11%	0%
Midwest	Main Site	Y	8	11.25	88%	25%	0%
Overflow	Main Site	Y	4	15.00	100%	50%	0%
South Central	Main Site	Y	2	15.00	100%	50%	0%
Southeast	Main Site	Y	7	10.00	71%	14%	14%
UK	Main Site	Y	12	13.33	92%	33%	8%
Upper Mid-Atlantic	Main Site	Y	8	10.00	75%	13%	13%
Upstate NY	Main Site	Y	4	12.50	100%	25%	0%

Data


Texas A	Texas A&M A	10	10	0	20
Texas B	Murray State A	0	10	0	10