11.24: Two wave pulses travel to the right v 7/qadxuhe7+ )5pqxftoward a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best represents the superposition of the pulses when the cente7edf h)/ x+7xupa q5vqrs of the individual pulses coincide?

  08.30: A light beam passes throug-d+vgeq/nyl )h the air and strikes the surface of a plastic block. Which pair of statements correctly describes the phase changes for the -gey) /ndqvl +reflected wave and the transmitted wave?

  12.02: A ray of light passes straight do.bep,0r z/1o (5 mka)xmy wcspr g96vdwnward through the point labeled B in the diagram shown. The ray reachesm bpkye.0m rp9wv,x g1 a/ )65zsr(ocd a flat mirror placed at an angle $\Theta$ to the horizontal as shown. Which one of the locations labeled in the figure best represents the point through which the ray reflected from the mirror will pass?

  00.04: Specular reflection occurs whuh4, u aevh ; osbnaf88eb/v8(enever light is incident on

  05.18: A student hold a hand mirror to observe the back of her heade)pg:qlh fu1 8g9xpied 2x7f 5k8zi(g while standing in front of and looking into a wall mirror. If she is standing:zidgi58l gphu 9x28k( qgpe7x f1)ef 4 ft in front of the wall mirror and she holds the hand mirror 1 ft behind her head, she will see the back of her head how far behind the wall mirror?

  14.25: It is observed that a light rayqlc00wink p,) .adl9 r changes direction when it enters a new material. Which one of the following ch0 w 9n.lq lr,ik)dc0apoices is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air zpf q;ocp p u5hm23t15has wavelength 400 nm in a transparent material. What is thef55ppoum c 13z;p2 htq index of refraction of the material?

  98.04: As sound travels from steel into air, both itr,i5 vln8l; igbv*fstv;0za/z 48 zrds speed and its:

  00.01: As a wave moves from o zpggex-jhyx zk;(y68 9c8p -n1/tk spne medium to a second medium with a different index of rey6 8 nk(-yz;ts1- /j pzpchg kpgx89exfraction which of the following wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork2 g* )+agplqouplru :( of single frequency travels from air (with speed of sound 340 m/s) into rock (with speed of sound 1500 m/s). Which statement is true about the wavelength and frg u*pola2luq( pg: +r)equency of the sound as it passes from air to rock?

  14.28: A waterproof speaker placed at the botto4qovkeqsi.. u eu b9ykn3 260 gqh3ub-m of a swimming pool emits a sound wave that travels toward the surface of the water. In the water, the sound wave has a frequency n9q0q vqbyk3s- 6guo.u.3 ieub2ke4h $f_{water}$, wavelength $\lambda_{water}$ , and wave speed $v_{water}$ . When the sound wave enters the air it has a frequency $f_{air}$ ,wavelength $\lambda_{air}$, and wave speed $v_{air}$ . Which one of the following relationships correctly compares the frequencies, wavelengths, and wave speeds of the waves in the air and water?

  02.33: A short burst of white light strikes a rectangular glass bxi3 fid2uz /c x448n xx7dcg(tlock with an angle of incidd8n/x 4zcx dxxi7i t(g42 uf3cence of $0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of light is directed toward a point P on a bounfrwefe + w-8/gdary as shown to the right. Which segment best 8egf/ -erw+wfrepresents the refracted ray?

  98.17: Which diagram best represents what happens to a ray of light entering aistgj+( vfd:5)d abw)q r from water?gwv q d+ta(:)fbj)s d5 Air is at the top in all diagrams.

  94.11: The critical angle of a material is the angle of incidence for whic *o . 6.dqdu9d1nu vlwesn7; 7peil7sdh the l*o9e7ev61s.n7 iddun 7 l dwps du.q;angle of refraction is:

  95.12: The principle underlying fiber op;.ubq e9ed2gc tics is:

  98.36: The critical angle in a transparent substa qxoy padtc,yn+e 4k:cmf ;;j y;-,:dnnce surrounded by air is $30^{\circ}$. The speed of light in
the substance (in multiples of $10^8$ m/s) is most nearly

  01.28: Light travels from material X with an ind4q7m hmrei:fqmq(i5d3y0ue6e h;ti9 ex of refraction of n = 1.5 to material Y with an index of refraction of n = 2.0. If the speed of light in ma:6eimey 7quiiqhmqf5943 m 0 drte;(hterial Y is v, what is the speed of light in material X?

  03.15: A jeweler can 7xp7afdgiq .n lf441idistinguish between a diamond and a piece of glass by observing the critical angle of the light in eacn fl7ia14i.x4f7gq pdh material. Glass with an index of refraction of 1.52 has a critical angle of $41.1^{\circ}$ while a diamond with an index of refraction of 2.42 would have a critical angle of:

  05.26: Light shines from air into a ;ze0,y1 vjjjvclear material. When the light makes an angle of incidence equal to v ;je,zjvjy 10$30.0^{\circ}$, the light refracts at an angle of 1$5.0^{\circ}$. If the light is shone from an angle of incidence of $60.0^{\circ}$, what is the angle of refraction?

  95.40: A Metrologic laser is embedded in a materianpqku4v8a/.cc5g3x v21oozm l of index of refraction n. The laser beam emerges from the material and hits a target. See the accompanying figure for the position k/z8. x1og4uqcm3c v n5vaop2parameters of the laser and target. The value of n is:

  95.31: A beam of light passes f:usbwz6go*7 nwoi o.;rom medium 1 to medium 2 to medium 3 as shown in the accompanying figure. What is true about the respective indic :;6gns7 *zuwobw.oo ies of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to medium)nyyq5y orw+ 6 3 as shown in the)o65+rqw nyyy diagram. What may be concluded about the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray takes passing thnuzt* d:k :gph r4nuf+q;c1 u8rough three transparent materir+qn ug8 ;1t4zuhc :pd n:u*fkals. The indices of refraction in materials 1, 2, and 3 are n1, n2, and n3, respectively. Which of the following best describes the relation between the indices of refraction?

  09.34: The diagram below shows the pa 6b6bfwkb6 v 02b0bypcjc1p 6fth taken by a monochromatic light ray traveling through three medi0w0fpbc1vj6b6c6 yf2bbk6p ba.The symbols $v_1$,$\lambda_1$ , and $f_1$ represent the speed, wavelength, and frequency of the light in Medium 1, respectively. Which of the following relationships for the light in the three media is true?

  99.26: A beam of light travelvl(k5 by-1 to u*ysim/ b,rsn:ing in glass ($n_g$=1.5) strikes a boundary with air ($n_a$ =1.0) at point P.The angle
of incidence is $60^{\circ}$ as shown in the diagram. Which ray would best indicate the beam’s path after point P?

  04.35: A ray of light i( :tppy30./qh1 knharg a-kfts incident on the surface of a rectangular block of glass at an angle of 3f/ apyt0 (nk.p:1rgkh tha-q $45^{\circ}$. It refracts into the glass and then strikes the side of the block as shown in the diagram. What would be the most likely path of the light after striking the side of the glass block?

  13.27: Light of wavelength 600nm is transmitted from air inte21u+sc6zxco 1rzjyxe((d h 1o a piece of glass. Which one of the labeled arrows best indicates the path of the light ray after it enters the gle 1zy(zd6+uc 1exxs1 orh (2cjass?

  14.44: A ray of monochromatic light;hrfla2u* j w2 enters the right-triangular glass as shown. The glass has an index of refraction of 2.00 and it is surrounded by air. Which one of the lettered rays shows the2f ;h2alju *wr path of the light after it exits the glass?