birefringence - Florida - Buzzpoints App

Question

Answer the following about rutile, or titanium dioxide, for 10 points each.

[10m] Rutile exhibits one of the highest magnitudes of this optical phenomenon for any crystal. This phenomenon, in which materials exhibit two different values of index of refraction, was first observed in calcite crystals.

ANSWER: birefringence [or birefringent]

[10e] Nanoparticles of rutile strongly absorb this radiation, leading it to be used in many sunscreens. Impurities in minerals like calcite and fluorite cause them to glow when exposed to this kind of radiation.

ANSWER: ultraviolet [or UV; accept UV-A or UV-B or UV-C; prompt on blacklight by asking “what type of radiation is emitted by a blacklight?”]

[10h] Rutile is an accessory mineral of this metamorphic rock that consists of garnet and omphacite. The presence of facies of this rock is indicative of ultra-high-pressure metamorphism.

ANSWER: eclogite

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Summary


Northern California	Main	Y	4	17.50	75%	100%	0%
Southern California	Main	Y	6	20.00	100%	83%	17%
Florida	Main	Y	6	13.33	100%	33%	0%
Great Lakes	Main	Y	7	12.86	100%	29%	0%
Lower Mid-Atlantic	Main	Y	10	13.00	100%	30%	0%
Upper Mid-Atlantic (2)	Main	Y	5	14.00	100%	40%	0%
Lower Midwest	Main	Y	4	12.50	100%	25%	0%
Upper Midwest	Main	Y	10	18.00	100%	80%	0%
North	Main	Y	5	14.00	100%	40%	0%
Northeast	Main	Y	12	14.17	100%	42%	0%
Northwest	Main	Y	4	15.00	100%	50%	0%
South Central	Main	Y	8	15.00	100%	50%	0%
Southeast	Main	Y	8	13.75	100%	38%	0%
Upstate NY	Main	Y	1	20.00	100%	100%	0%

Data


ERAU A	ERAU B	0	10	10
Melbourne A	FSU	0	10	10
UCF A	FIU	10	10	20
UF A	UCF B	10	10	20
UF B	UF E	0	10	10
USF	Melbourne B	0	10	10