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Oct 30, 2023

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in 1 Chapter 28 Ref Pool Room Optics " and CONCEPTUAL Pl\ysic ectio ion The law of reflection for Optics bouncing off the bank of ;g‘;ills usefy iy Playin reflecting off a mirror. AS the Sktable b straight lines with the pg, o m_etch The diagram shows ato o |rror§. with a flattened “mirrgreqr . Of this r ) that the angled path of theeg On. Notg appears as a straig ht line d the mirrored region, (dasheq) Consider a one-bhg nk sho to the north bank t (one reflectio, and then into side pocrllgrgm 5 the ba| D E F a. Use the mirror method to construct a straight-line path to mirrored E', Then construct the actual path to E. b. Without using off-center stroke r other tricks, can a one-bank shot off the north bank put the ball in corner pocket F? 2 Vo Show why or why not using the diagram. Mirrors, actudl or imagined, improve your pool playing! 115 il

Reflection and Refraction ~ J CONCEPTUAL PhySiCSW_—\ Chapter 28 : Pool Room Oplics-—cont/nued A 8 C, 2. Consider the left = i diagram, @ two-bank | shot (two reflections) into corner pocket F. Here we usé two mirrored regions. Note the straight line of sight to F? and how the north- bank impact point matches the intersection between B'and C" a. On the same diagram to the left, | \ construct a similar path for a two-bank x shot to get the ball N in the side pocket E- D" 3. Consider above right, a th pocket C, first bouncing ag to the north, again to the sou ct the path. (First construct the single dashed line to -bank shot into side pocket B. or pocket F t to corner P! ad a two-bank shol o to F). Note how our two m! ree-bank shot into corner ainst the south bank, then th, and into pocket C. A c") a. Constru b. Construct the path to make a three: 4. Let's try banking from adjacent banks of the table. Consider (fir§t off the west bank, then to and off the north bank, then in regions permit a straight-line path from the ball to F". Now voufe’ 'e”d"' for koleidoscoPes: 116 J

Chapter 28 Ref] ectio Reflection N and ~~ MIRROR B Abe and Bev both look in a plane mirror directly in front of Abe (top feft vi i g eft view). Ab while Bev cannot see herself—but can Abe see Bev, and can B(evpsee Abe?) } To show the answer, we construct their artificial locations “through” the mirror, the same distance behind as Abe and Bev are in front (top right view). If straight-line connections intersect the mirror, as at point C, then each sees the other. The mouse, for example, cannot see or be seen by Abe and Bev (because there’s no mirror in its line of sight). Here we have eight students in front of a small plane mirror. Their positions (i% @ i are shown in the diagram below. Make ™ - gf@ appropriate straight-line constructions to answer the following: s Ev;\\ % W o fuy @ ~+~MIRROR Guy HAN A8 Bey cis Don Eva FW0 e Doh e = Abe can seg ‘E'/G/ F{O/ MW/ hon ol /_A’l’e;fi',‘_,— Bev can see Héﬂ/hcfn Bl Al T L i : ; ot seé — h Cis can see CE5- 1ot e | 0L sane e Do > Don cannot €€ UY- hat N can see be\l ~ ql ! 9 £%2 can seq Alse — Fia "o e~ o0 Huycansee Akf/ C)Oh see 3N cq : an cannot Mo Aipe bov) <is H 4 i ; to Marshal Ellenste!? %'m t! Flo cannot $68 Guycanmot e —"p,p ~ heh Eva cannot see/ﬂg/fi’ eyon Lot P A ——EE 17

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SoncerTuAL PIWYIS® 00 nd Refraction 28 Reﬂectlon a Chapter _-—continuad Reflection six of our grouP are Now arranged d shown below: Make appropriate con questions pelow- structions for EVoO , g Vo Flo " Jon, 90, ; ah glu Non, ph ,. Ane, BeY sl Does this region of the mirror depend 0N ifferently in front of the same plane mirror. Thei this interesting arrangement and T Positiq, answegr thseare Who can Abe not sé {VC()C,-‘E % Who can Donn a not see? Al g Who can EVi Who can Flo not see? Ake Doh __b—T—Q\}—JE—Wfﬂ N — il il

Reflected Views f low shows he extension of gng ofthe 1 ray d|agran_1 bel i Eg;plete the diagram by xtending them behing g ?Assume the candle and Ocate the image of the flame, image are vieweq by a Obseryer on the left.) irl takes @ photograph of the 2' Asglsr:lo:vn. Which of the two sketches gelow correctly shows the reflected view of the bridge? Defeng your answer. bridge [tfie (+e) V(C\fvwscmsk:(s Tl;; 7 he / Whaor Q \V the waede SpTfece £l ’ff[‘:’/ A '\ 7 lg ifi’fi—) Ia l e

c - I ONCEPTUAL PllySICs mCTICE PAGE Chapter 28 Reflection and Refraction More Reflection 1. Light from a flashlight shines on to indicate the illuminated card. 2. A periscope has 2 pair of mirrors in it. =% Draw the light path from the object 0" e _Aw\/ to the eye of the observer. I— MIRROR 3, The ray diagram pelow shows the reflecti of one of the rays that strikes the parabolic mirror. i he law of reflection i obeyed and the angle of incidence (from the normal, the a of reflectio (from the norma ). ed ra e other three rays that are shown. a mirror and illumin ates oné of the cards. Draw the reflect ed be am

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