Grade 10 Optics Unit Test Review

Grade 10 Optics Unit Test Review

Date of test: Tuesday test: Tuesday March 8 / Wednesday March 9 Make sure you review the foowin! topics for the test"

Properties of light: #i!ht is a for$ of ener!y% that traves in strai!ht ines &isi'e i!ht is a very s$a part of the eectro$a!netic()M* spectru$ + for a parts of the )M spectru$% the wave en!th is indirectly proportiona to the fre,uency e- a .ORT waveenth has a G fre,uency and therefore a ot of ener!y% such as -rays (see dia!ra$ in your notes* • •

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Different types of light: ncandescent (2re!uar3* vs 4uorescent 'u's + the efficiency and advanta!e of each type e-5how $uch ener!y !oes into producin! i!ht vs heat 6hosphorescence% che$iu$inescence and 'iou$inescence •

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Law of Reflection: The an!e an!e of incidence incidence is e,ua to the an!e of refection refection55 7now so$e so$e factors factors that coud resut in these OT 'ein! the sa$e% whie perfor$in! an e-peri$ent5 With a pane surface $irror% know the reationship 'etween the o'ect + $irror  distance and the i$a!e + $irror distance •

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Image characteristics: Use the acrony$ .:#T or #O.T to descri'e the resutin! i$a!e in a $irror or a ens R):# i$a!e + is for$ed when refected rays $eet ;it woud appear on a screen &RTU:# i$a!e + is for$ed when refected rays do OT $eet and the rays $ust 'e e-tended 'ack •

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Mirrors: principa rays that are used to deter$ine i$a!e ocation • • •

Lenses: .a$e info as $irrors% for dia!ra$s + the $aor difference is that the i!ht rays trave throu!h% of course% there is an optica centre that the i!ht rays are drawn throu!h% and eal  i$a!e the r eal   i$a!e is produced on the opposite  side of the ens5

Equations: t is 6hysics% after a?? 1* nde- of Refraction ( a ratio of speeds of i!ht in air" another $ediu$* @* Ma!nification e,uation >* Thin ens e,uation The e,uations wi a 'e provided for you5 Ao OT take short cuts% or it wi cost you =G $arks5 Write out Given% Re,uired% Anaysis (e,uation" $ake sure you rearran!e it first% if necessary% 'efore pu!!in! in the nu$'ers*% oution ;7now the speed of i!ht in a vacuu$ (air* Partial Reflection and Refraction ! "otal Internal Reflection#"IR$: Think of the se$icircuar pris$ a' investi!ation" #i!ht traveed fro$ one $ediu$ to another% so so$e i!ht refected and so$e refracted + When the incident an!e causes the refracted i!ht to e-it at 90 de!rees% this is caed the critical angle5 The siBe of the critica an!e depends on the indices of refraction of the @ $edia5 When the incident an!e is !reater than the critica an!e% no $ore refraction occurs% ony TR "he %uman Eye and Lens "echnologies: =e a'e to a'e a dia!ra$ of the hu$an eye% with the $ain structures + you $ay 'e !iven the function and have to a'e the part5 =e fa$iiar with the cornea (where  !ot scratched% twice% and where the $ost i!ht is refracted% the retina which contains i!ht sensitive ces caed rods and cones% the pupil% the iris% the lens and the optic ner&e (which !ives us a 2'ind spot3 in each eye* Myopia: nearsi!htedness + Cou <: see near% you have difficuty seein! far% since the i$a!e is focused in front of the retina ;; ensretina distance usuay too ar!e %yperopia: farsi!htedness + Cou <: see far% you have difficuty seein! cose up% since the i$a!e is focused 'ehind the retina ;; ensretina distance usuay too s$a Pres'yopia: a for$ of farsi!htedness% caused 'y a oss of acco$$odation (ens doesnDt chan!e shape as easiy* since it is !ettin! oder + ike $oi?? Astigmatism: the $ost co$$on vision pro'e$ due to an irre!uary shaped cornea% resutin! in 'urred vision% headaches% eye strain (ther optics technologies and how they have i$pacted society and $ade our ives 'etter + think of the cass presentations