chem lecture notes 5

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University of Toronto, Scarborough *

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10H3

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Electrical Engineering

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Oct 30, 2023

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pdf

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1

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‘Lecture 9_ Sept be used ) explam expenmen’axl observations. - W SUPER small pianck's wns%an+ Lr ‘becavse ovuaahons biwn aowed L ValUes s SO {\_{l\% _Ahad we cant_actuany detedt u usm% measur.noa 4ools ? enexgyc = continuaus on the macroscate | CALCULATION E%BM?LE-"' VSN PLANCK BEOLATION “» Whot is the enerszj of o photon_of green | \|5h‘\' wf uoowe\et\g% S200A A 5200, 4 Az1.0x10""% , conversinto frequencey® speed of \\%hj-[ggonsxgm (€ 2300,000,000mIs) " _ &equen% in s y=nc. ~»ispeed of lgnt. 5\..-\’ mo.ve\eno&-\'h nm ] | ! L vz 300,000,000 ms e L ) |.ono"°m L s.33 0" Fg;fl:'uenc,q 2 5200 A - 10 ONCE WE _HAVE FREQUENCY WE CAN cONVERT TO ENERGY E=h = 6.626 % 1O Dbb’bfibififibfi”i 393.8 % 5.33 10Mg™' = 3.92x107"77 W____ L“LNGTQ_E,QF_MGJHTL&HO‘YOE—LEGTR\C EEF\'—LC\’ > “_phataelectric effect: when light shines_on same_metal surfacess J UV - 'elecirons_are_emlt\-ed_from _4he_metal thot can be detecred D>l 2——~+—— kinetic energy of ANese e\Erons. can be.measvred vnder vorious lignt | condirions ey L high vs. low freaveney tight = © | high Vs, oW omp Lm\ens\hqs \\oam awv INATURE QF LIGHT. _THEJ’HQTOELECTF\_Q-EFFECLQND‘PBE QUENCY . .. " W . > BT €54 » exomining doto when We Keep amp. SOME but change +he frequency (3\€F vOlovr, same bnghmess ) | lignd be\ow certain freay cno\a woo\d ot ejeo} e\w\-rons " THRESHOLO FREGVENC Scanned with CamScanner
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