11.24: Two wave pulses tr :op3l nii2ti3avel to the right toward 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 p3tiin ol: 32piulses when the centers of the individual pulses coincide?

  08.30: A light beam passes through the air and strikes the surface ovwa 7 ia2mif2f0fjw6;;fi8 onf a plastic block. Which pair of statements correctly describes the phase changes for the reflected wave and the tr 8wffof 2i;a0if2;jwvm n ia67ansmitted wave?

  12.02: A ray of light passes straight doir.q h1( n6t83fei7ls+ws +b)d 1 .dxa zdwqnbwnward through the point labeled B in the diagram shown. The ray reaches a flat mirror placedbe1nrb 1fn3 dh)w +i 8dws+.a6x qzq.lst7di( 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 reflu.+o :ud.xmqb ection occurs whenever light is incident on

  05.18: A student hold9g6z1p eb 21 zp1oj7 cnnxf 2yejii;+e a hand mirror to observe the back of her head while standing in front of and looking into a wall mirror. If she is standi xjgy6n z1+ e2iz 1 9b7jnf2;ipe1poecng 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 ajaosz18 *0zvw light ray changes direction when it enters a new material. Which one of the follo* soz0v8wa jz1wing choices is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wat9t*v,0y*xfc l jt0q eb1w+u-5t ltyovelength 400 nm in a transparent material. qyt, 9xy- ltu 0*tt*jc+otwl01veb5f What is the index of refraction of the material?

  98.04: As sound travels from h d7b 5cv 4:k ojb o7nx*us)*nuievn.-steel into air, both its speed and its:

  00.01: As a wave movel +e.h 6ujdbr:h6gtl0s from one medium to a second medium with a different index of refraction which of the following wave properties jrdhu+ e6.bg6ll:ht0 would NEVER change?

  05.47: A sound wave generated from a tuning fork3cgtdf 9/ap-9)c h dazpu t8u- 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 -p 3gcath /u)8-pzd9a f9uctdabout the wavelength and frequency of the sound as it passes from air to rock?

  14.28: A waterproof e wh1 vrak6kqk573b0sspeaker placed at the bottom of a swimming pool emits a sound wave that travels toward the surface of the water. In the water,7ws ekk b635vk01hrqa the sound wave has a frequency $f_{water}$, 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 s(jxhm7q1 )it ftrikes a rectangular glass block with an angle of incidet7 q()h1mx fjince 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 boundary ay p9x;3e:znznezklqip31-f/ s shown to the right. Which segment best represents thel k;-pe p3y1/ezq zzi fnx93:n refracted ray?

  98.17: Which diagram best represents what happevf(e- ym)9*ahg x-hgkns to a ray of light entering air from wg*(yaf--xhhkvg em) 9ater? Air is at the top in all diagrams.

  94.11: The critical angle of a material is the angle of incidence forn*d. e vp(f3 a)qo(u; ;4ep 5xz-udm/facwnd e which the angle of re5* qf4 wnm a/f.dd(zaeuev d3cppxu) eon(-;; fraction is:

  95.12: The principle underlying fiber optics ik.mnw xgyyl/q8n6; ) us:

  98.36: The critical anglchysf+ m* ib2738evmr e in a transparent substance 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 travels2:y qefy bt74j from material X with an index of refraction of n = 1.5 to material Y with an index of refraction of n = 2.0. If the speed of light in material Y is v, w : 4qef2byyjt7hat is the speed of light in material X?

  03.15: A jeweler can distinguin894 hzs1eeu1,;lgmspy8qhx sh between a diamond and a piece of glass by observ;x9en,q pmsy 48 ezl8h1uh1sging the critical angle of the light in each 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 clear material. When the light makes an an b5 ;m-3ipffhrgle of incidence equal to ir-h;3mpbff 5$30.0^{\circ}$, 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 embeddeh. 7eqxyvgh yc:ah2,0u q(2hld in a material of index of refraction n. The laser beam emerges from the material and hits a target. See the accompanying figure for the pos ,ah:uqehy xhh0y.l cvg27q( 2ition parameters of the laser and target. The value of n is:

  95.31: A beam of light passes from medium 1 to medium 2 to mediu*v m:u j-46g x7q2h r) 4)j ojlam6fskxumn8usm 3 as shown in the accompanying figure. What is true aboum8ouv6- lkj h um24xf)u: rsqasnj6m)4*j7xgt the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to medium 3 as shown inu/ *z14uh8x tr1 ph3xtijeg* kx /zgr hhu8e* 1k 3t*xi4u1tjp the diagram. What may be concluded about the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path thata/g kki grvc0c+7 ,s:m* fv(qc a light ray takes passing through three transparent materi f7vg+k,ar/ski c(0c*cqmvg :als. 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 as(74s.v n m7 :xkr;;aiubi(ziscd1 athe path taken by a monochromatic light ray traveling through three media(z:47c 1muvkrni;absd as7 (x; .iais.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 t jf;0 +rmbt:lb7yswb ;iq 3d,braveling 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 is incident on the* l50gzawn+ ym surface of a rectangular block of glass at an zg0m 5 +wylan*angle of $45^{\circ}$. 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 into acc1 c5jrjdg ,-okjr ;i oz+)z: piece of glass. Which one of the labeled arrows best indicates the path of the light ray after it enters t ,+1 ;zogo:rrij) -j5cjdkc zche glass?

  14.44: A ray of monochromatic light enters the right-triat o0uk1mki fi/0 vhb6hry:)-l ngular glass as shown. The glass has an index o:k-i h)/thkf06 yivlm0r bo1 uf refraction of 2.00 and it is surrounded by air. Which one of the lettered rays shows the path of the light after it exits the glass?