11.24: Two wave pulses travel to the right toward a rigid boundary as sho:/ -uwv+zdn,llxo ) e lknm,w(wn. 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 centers of n-uol(/k m n,+ vx:eld)wzw, l the individual pulses coincide?

  08.30: A light beam passes through the air and strikes the surface o2mz oh s6(z 0.rhmykhjz6;6 arf a plastic block. Which pair of statements correctly describes the phase changes for the reflected wave and the transmitted wj ;myh a. k os6rmzz0hzh26(6rave?

  12.02: A ray of light passes straight downward through the point labe(5/sl(t*ux1ghp16pbvg3 suf a rwxeni2- e 0 vled B in the diagram shopgw b *v hte2xeui3/fg1arssu x6 p1(n (l-v05wn. 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 reflec1lr4i w*p8t*wa;-bjq khcsc 1tion occurs whenever light is incident on

  05.18: A student hold a hand m.begqp wb)9*jirror to observe the back of her head while standing in front of and looking into a wall mirror. If she is standing 4 ft in front of the wall mirror and she holds the hand mirror 1 ft behig w bje)b*9pq.nd 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 it enters a new 81l)eyi vq.o n.2afxqmaterial. Which one of the following choices is the term best associated with of qvlyxn2e.a) .iq81this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wctcho 5 5z/*edwizg v,kw4c(0 avelength 400 nm in a transparent material. What ig0wzw5 z4 tecd ickc/5*v,(h os the index of refraction of the material?

  98.04: As sound travels from steel into air, both its speedoouvrvj7e(qg,u /6- m and its:

  00.01: As a wave moves from one medium to a second medium with a different indexsc*imzb51 ; ea of refraction which of the following *sc5aeibmz;1 wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of single fr+ac*khd 9y0 lrequency travels from air (with speed of sound 340 m/s) into rock (with speed ol0r9 *yhda+c kf 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 speaker placed ac)zwcap1.g4 +p t f h0g-l:du2umv,jg t the bottom of a swimming pool emits a sound cvp)2mzcu 4:g+01gagdf- u,wh.l j ptwave that travels toward the surface of the water. In the water, 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 a rectangular glaimy5 naf;.7mj:abq4css block with an angle of incidence5 ni; bfcyaa q7m.j4:m 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 boundaa3ge 0-sd 2tttfc4deguqb-5094 q24 etodrnary as shown to the right. Which segment best represents the refrace tsde q2 egatc9o3t-rq0g2 nbdad4u-04tf54ted ray?

  98.17: Which diagram best represents what happens to a ray of light entering ja2c6,,hainj*8h hii air from water? Air is at thehc,h h nai6a8 ,j*2jii top in all diagrams.

  94.11: The critical angle of a iy+56v,aui 6vgr s lh;material is the angle of incidence for which the ang 5g,l ;u 6ra+vivhs6iyle of refraction is:

  95.12: The principle underlying fiber optxhl0e92 pmblaqz w54w)p2o z3 ics is:

  98.36: The critical angle in a transparent substavxz 6-4*jne*k ku ia8vnce 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 index of dau0yv ;k6/forefraction of n = 1.5 to material 6 y vk0aof/du;Y with an index of refraction of n = 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 diamond1 -10i2p,s tqyra*h2 xykqudb and a piece of glass by observing the critical iyr1*tqxpd h,qkuya2s0 1- 2bangle 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 materia7vmher1sm6/w,:q c* icq rcl9 l. When the light makes an angle of incidencercs, 7 c*/ c 6wh1:mrilqqvem9 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 material of index of refracr21*gtkg*fv u9c 5apvtion n. The laser beam emerges from the material and hits a target. See the accompanying figure for the position parameters of the laser and targu5 pvr*9k *cgavf2t1g et. The value of n is:

  95.31: A beam of light passes from medium 1 to medium 2 to mediutoii:x4:gfrr )a+ hn-m 3 as shown in the accomrg fa)ro 4hx-i:nt:+ipanying figure. What is true about the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes ce)r.) v w9vsbpn3g;xfrom medium 1 to medium 2 to medium 3 as shown in the diagram. What may be concluded about the three 9ps);xbwr3.c ve)gvn indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray takes paj--jqpa*s yc,rhp )r7i kt 1q/ssing through three transparent materials. 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 refracti-, c*ht jq 7j ppra1-rs/yikq)on?

  09.34: The diagram below shows the path taken ad0 *w4*tz2brtguwn .p 2x w;q+ 8nqstssz4r7by a monochromatic light ray traveling through three mn gw48tq*sx24+u; z w0z*d.2w 7nr srsbqpttaedia.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 traveling in79 ba*lf io: itsc8)ix 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 rectangularjz+/ ,4feriqz block of glass at an angez/ fz+q4rji,le 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 603ubn)m2uim:/ *o mdaw0nm is transmitted from air into a piece of glass. Which one of the labeled arrows best indicates the path of theoi:m*3um b/mw n)u a2d light ray after it enters the glass?

  14.44: A ray of monochromatic+bma /y:h)1gzat7 upcec9t7 r light enters the right-triangular glass as shown. The glass has an index of refract mrc7u7 9atabez tc1)yh:g/+pion 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?