fluorescence - 2025 ACF Winter

Question

Cathode ray tubes use a form of this phenomenon that uses an electron gun. For 10 points each:

[10e] Name this process in which a material absorbs light and re-emits it a longer wavelength.

ANSWER: fluorescence [prompt on luminescence]

[10h] This phenomenon is the result of vibrational relaxation or solvent reorganization. The “anti” form of this phenomenon may result from the dissipation of phonons in a crystal lattice.

ANSWER: Stokes shift

[10m] Stokes shifts can be seen on Jablonski diagrams, whose columns represent this quantity. An energy level with a value of 2 for this quantity is called a doublet.

ANSWER: multiplicity

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Summary


California	Main	Y	5	2.00	20%	0%	0%
Canada	Main	Y	5	6.00	20%	40%	0%
Florida	Main	Y	12	4.17	17%	17%	8%
Great Lakes	Main	Y	6	0.00	0%	0%	0%
Lower Mid-Atlantic	Main	Y	7	4.29	43%	0%	0%
Midwest	Main	Y	8	3.75	38%	0%	0%
North	Main	Y	10	3.00	20%	0%	10%
Northeast	Main	Y	5	2.00	20%	0%	0%
Overflow	Main	Y	4	10.00	50%	50%	0%
Pacific Northwest	Main	Y	10	4.00	40%	0%	0%
South Central	Main	Y	5	2.00	20%	0%	0%
Southeast	Main	Y	1	0.00	0%	0%	0%
UK	Main	Y	4	5.00	50%	0%	0%
Upper Mid-Atlantic	Main	Y	8	5.00	25%	13%	13%
Upstate NY	Main	Y	8	3.75	25%	0%	13%
2025 ACF Nationals	2025-08-09	Y	3	6.67	33%	33%	0%
2024 ARCADIA at UC Berkeley	04/19/2025	Y	4	5.00	50%	0%	0%

Data


Berkeley D	Berkeley B	0	0	0	0
Berkeley E	UCSC	0	0	0	0
Stanford B	Berkeley F	10	0	0	10
Stanford C	Berkeley A	0	0	0	0
Claremont Scripps	USC	0	0	10	10
UCLA B	UCLA C	10	0	10	20
UCSB	UCI	0	0	0	0
UCSD Two Running Violet V Forms	Claremont Pitzer	0	0	0	0
UCSD Vices and Virtues	UCSD What Hath God Wrought	0	0	0	0
Stanford A	Berkeley C	0	0	0	0
Toronto A	McGill A	10	10	10	30
Guelph A	Ottawa	0	0	0	0
Guelph B	Queen's A	0	0	0	0
McMaster A	McMaster B	0	0	0	0
Queen's B	Toronto G	0	0	0	0
Toronto I	Toronto F	0	0	0	0
Toronto H	McGill B	0	0	0	0
Toronto J	Toronto E	0	0	0	0
Toronto K	Western Ontario	0	0	0	0
Toronto B	Toronto Metropolitan	0	0	10	10
Waterloo	McMaster C	10	0	0	10
Toronto C	Toronto D	0	0	0	0
ERAU A	UF A	0	0	0	0
Melbourne A	USF	0	0	0	0
UCF B	UF C	0	0	0	0
UF B	UCF A	0	0	0	0
ERAU B	UF E	0	0	0	0
FSU	Melbourne B	0	0	0	0
CWRU A	Kenyon A	10	0	0	10
CWRU D	OSU B	0	0	0	0
Pitt A	Kenyon B	10	0	0	10
OSU A	MSU A	10	0	0	10
OSU C	Pitt C	0	0	0	0
MSU B	OSU D	0	0	0	0
CWRU C	Pitt B	0	0	0	0
South Carolina A	Clemson B	0	0	0	0
Clemson A	North Carolina C	10	0	0	10
North Carolina B	Roanoke	0	0	0	0
Tennessee B	Liberty C	0	0	0	0
Liberty B	Tusculum	0	0	0	0
Virginia Tech B	Virginia A	10	0	0	10
Virginia Tech A	Virginia B	0	0	0	0
North Carolina A	Tennessee A	10	0	0	10
George Mason B	Johns Hopkins C	0	0	0	0
Penn A	George Mason C	0	0	0	0
Maryland B	George Washington B	10	0	0	10
Johns Hopkins B	Catholic University	0	10	0	10
Maryland A	George Mason A	0	0	0	0
Notre Dame E	Maryland C	0	0	0	0
NYU A	Maryland D	0	0	0	0
NYU B	Georgetown B	0	0	0	0
Georgetown A	UMBC A	10	0	0	10
VCU A	Penn B	0	0	0	0
Columbia A	Rutgers B	0	0	0	0
Vassar A	Princeton A	0	0	0	0
Columbia C	Rutgers C	0	0	0	0
Swarthmore A	Rowan A	10	0	0	10
Lehigh B	Lehigh A	0	0	0	0
Missouri A	Truman State	10	0	10	20
WashU A	SIUE	10	0	10	20
WashU D	WashU B	0	0	0	0
William Woods	Missouri B	0	0	0	0
Illinois A	Notre Dame C	10	0	0	10
Chicago A	Illinois B	0	0	0	0
Chicago B	Indiana A	10	0	0	10
Indiana B	Chicago C	0	0	0	0
Michigan A	Louisville A	0	0	0	0
Michigan C	Notre Dame B	10	0	0	10
Purdue A	Michigan D	0	0	0	0
Purdue B	Chicago D	0	0	0	0
Purdue C	UIC	0	0	0	0
Notre Dame A	Illinois C	10	0	0	10
Nebraska	Macalester B	0	0	0	0
St. Thomas	Minnesota A	10	0	0	10
Iowa State	Minnesota B	0	0	0	0
Macalester A	Minnesota C	0	0	0	0
Carleton	Wisconsin	0	0	0	0
Bowdoin A	Yale B	0	0	0	0
Alberta	Simon Fraser	0	0	0	0
British Columbia B	British Columbia A	0	0	0	0
British Columbia D	British Columbia C	10	0	0	10
Washington A	Washington B	10	0	0	10
McGill D	Arizona State B	10	0	0	10
Alberta B	Tulsa	0	0	0	0
Arizona State A	UTD A	0	10	0	10
Rose State	UTD B	0	0	0	0
Iowa	Texas A	0	0	0	0
Texas B	Northwestern B	0	0	10	10
Northwestern A	UCO	10	0	0	10
Northwestern C	Ohio	0	0	0	0
Huntsville B	Auburn B	0	0	0	0
Auburn A	Sewanee A	10	0	0	10
Georgia Tech A	Bruin A	0	0	0	0
Georgia Tech C	Mississippi State A	0	0	0	0
UAB A	Georgia Tech D	0	0	0	0
Georgia Tech B	Huntsville A	0	10	0	10
Alabama A	Vanderbilt B	0	0	0	0
Alabama B	Vanderbilt A	10	0	0	10
RIT A	Cornell-DII	0	0	0	0
RIT B	Binghamton A	10	0	0	10
Rochester	Binghamton B	10	0	0	10
Syracuse	ESF	0	0	0	0
Cambridge A	Bristol A	10	0	10	20
Warwick B	LSE B	0	0	0	0
Edinburgh B	Manchester B	0	0	0	0