11.24: Two wave pulses travel to thrh ggp b3hy g93z4b(k7e right toward a rigid boundary as shown. After reflection of the triangular pulse, the pulses will ik3( ggrpg7h bh4bz y93nterfere. Which one of the following pictures best represents the superposition of the pulses when the centers of the individual pulses coincide?

  08.30: A light beam passe2my a4sb 0wft(+yr d1ws through the air and strikes the surface of a plastic block. Whichfya m0d4tryb12 + wws( pair of statements correctly describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes s h* q axmb,0md2kr1m,utraight downward through the point labeled B in the dia0k2m,1hmm , axb*ruq dgram shown. The ray reaches 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 whenever light is d t6j7xinsk+n74qobd xj,y7(r4xe)w incident on

  05.18: A student hold a hand mirror to observe the back of her head(2rqzne52t16qby3q v a 1pvl t while standing in front of and looking intotvzl6a2pbqqe1y 5t2 1 q3 v(nr a wall mirror. If she is standing 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 ray changes direction when ;u l0 7amjpwv-it enters a new material. Which one of the ;pvu wm07 la-jfollowing choices is the term best associated with this phenomenon?

  96.19: Light that has wavelenq8x 3q5;i 6meg*q evhngth of 500 nm in air has wavelength 400 nm in a transparent mnme q3gv *i8h6qx5 ;qeaterial. What is the index of refraction of the material?

  98.04: As sound travels from steem jmu(x;v23s yl into air, both its speed and its:

  00.01: As a wave moves from one medium to a second medium witz q5)ouk*3y ckmxt +r7t.wj+ dh a different index of refractitq z*kmco7w 5dy r.+)kx3+ juton which of the following wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of single frequency travels fr c;9pen)j gjp2.x2u/ xb fai1com air (with speed of sound 340 m/b9)cnjju2xax1ei fp; .g 2p/c s) into rock (with speed of sound 1500 m/s). Which statement is true about the wavelength and frequency of the sound as it passes from air to rock?

  14.28: A waterproof speakereevgf4qiie6que5j9 9 j9b+4ko:p4 u ,rpj k0n placed at the bottom of a swimming pool emits a sound wave that travels toward the surface of the water. In the eiu p 4kn9 f9:4 6r 9qqiuv j,jejpebg4+5e0kowater, 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 strikes im,w m0by s4o-xynu0-a rectangular glass block with an angle of incidence of on00 ,mubmw- yy4i-sx $0^0$. 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 a+ *eoez 04):) rlbdqjd+el:ws qov kd4s shown to the right. Whi:zekovrwlqbq 4)0*l)d+e 4ds:o dej+ ch segment best represents the refracted ray?

  98.17: Which diagram best represents what happens to a raarszetkw9*n;/ lf5 e5s*k r:fy of light entering air from water? Air is aesza5*lfnwf /e 5 krt*;r s:k9t the top in all diagrams.

  94.11: The critical angle of a material is the angle of incidence for whixa a0+cspjc :9)i,;ca5ef ifdch the angle ofpf50,a9cacfd si x cji;e+ a:) refraction is:

  95.12: The principle underlying lcd5 1dzw4my-fiber optics is:

  98.36: The critical angle in a transparent substar 4l)g83ew(yq:hr8*4bungu b (vklvs nce 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 Xjk0fpuf,+, rx9zg.o c with an index of refraction of n = 1.5 to material Y with an index of refraction of n,ug ,p jck9. oxfzrf0+ = 2.0. If the speed of light in material Y is v, what is the speed of light in material X?

  03.15: A jeweler can distinguish between a diuazo 865y+m5 4yluw ybamond and a piece of glass by observing the critical angle of the light in each material. Glass with an index of re 5o6a+ l8uyw45mbzyuyfraction 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 49ysy6xu9xls l5sw/f xvlzf1 5x4z /n into a clear material. When the light makes an anglxys z/nlx y1zu4 /5sf5 6lx94vwl9f sxe of incidence equal to $30.0^{\circ}$, 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 9euvx7rs)r7 nyo5i3 tmaterial of index of refraction n. The laser beam emerges from the material and hits a target. oe59 yv7 sx)i7rnrtu3 See the accompanying figure for the position parameters of the laser and target. The value of n is:

  95.31: A beam of light passes from medium 1 to medi 7ig- qd,pd9hhum 2 to medium 3 as shown in the accompanying figure. What is true about the respective inh7dp i,-gq9dhdices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to medium n h;x4zgwpqys) +;yl; 3 as shown in the diagram. What may be concluded about the three indexes of ) nqg;l; wh4zxy; sp+y refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray taf ydj g nxxgdcc4.j,:m0x)f :)kes passing through three transparent materials. Thxd)c .fdx):ggc0 j4 fmyx :,nje 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 path taken by a monochromayf3-rx slwj iz9-hj*/tic light ray traveling through y9 3j-l-hfjr wz si*/xthree media.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 travelingwj;x.7xnxlfej+ 7 r;i 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 surface of a rectangular blocafty(ggg x u1 ;1n,i-dk of glass a;g11,yga(fxg d -tn iut an 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 transmi xg du,afiao9-9-fo, mtted from air into a piece of glass. Which one of the labeled arrows best indicates the path of the light ,9fxg9,o--aduifmao ray after it enters the glass?

  14.44: A ray of monochromatic light enters the right-trz sl,ohg/hk..pxgl/*u x 0hy0 iangular glass as shown. The glass has an index of refraction of 2.00 and.x p0/hs ggl o/uy,0hkl hxz*. it is surrounded by air. Which one of the lettered rays shows the path of the light after it exits the glass?