11.24: Two wave pulses travel to the right toward a rigid bou3hqlbll, jw0x cb 164mndary as shown. After reflection of the triangular pulse, the wlml0h6b1cql, b43jx pulses will interfere. 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 passes through the air and strikes the surface le+i 37aa8idc8 y nfyq91qzl8of a plastic block. Whicha+zia f89qnil q e38ld8c1yy7 pair of statements correctly describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light ptbi(7o9af h+hasses straight downward through the point labeled B in the diagram shown. The ray reaches a flat mirror placi9b+(ht7fo a hed 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 incident o qcwu-j i,g-g5n

  05.18: A student hold a hand mirror to obimbbi dw4; o,;oqm6 8wserve 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 behind her head, she will see the back o;m;o6,8wwiqomd4 ib bf her head how far behind the wall mirror?

  14.25: It is observed that a light ray changes direction wh,z+ax pxz6h2e q7n8ey en it enters a new material. ,ze2z8n+xa qe7 y6hxp Which one of the following choices is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air h/5xy1 zw; kz (dqqcrz0as wavelength 400 nm in a transparent material. What is the indez; d51(kwczq/ 0ryqzxx of refraction of the material?

  98.04: As sound travels from steel.4qye w ekk+,c into air, both its speed and its:

  00.01: As a wave moves from one medium to a second medium with a differeyf mo88a(k76:g qsxo0aymg(ent index of refraction which of the following wave p(qxg(6oog:yef 8ky amm8 07s aroperties would NEVER change?

  05.47: A sound wave generated from a tuning fork of single frequency travels fro6wno( ;kc,i4n+rtr.c.s7i 3 ajfrlyk4q p,f pm 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 frequency of the sound as it pas;7at4irf(.nipnsck+,4cj wy,36k. rfporq l ses from air to rock?

  14.28: A waterproof speaker placed at the bott 7s,*w jqdjx iyrkd:;y/tr1b4g 4m5azom of a swimming pool emits a sound wave that travels toward the surfaqj;zra b tmyd5y4d: g4,k/*x1j7rwsi ce 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 gl b c9xz jmnm1oy7d,3u/xv8j h)x.um1g ass block with an angle of incidence ofz.c398 om m j7d),bvuhx1u1gmj nyx/x $0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of light is direl 3zu:ic6- liq)mt vd.i4du -p)n6ehected toward a point P on a boundary as shown to the right. Which segment )i tlmv-npc iu 43)eud- l i6e6h:qz.dbest represents the refracted ray?

  98.17: Which diagram best reul .-a 5u)zvivpresents what happens to a ray of light entering air from water? Air is at the top in all diagram5i)z u u-alv.vs.

  94.11: The critical angle of a material is the angle of x1mwqx2 6avp-incidence for which the angle o 1- 2avxq6pxmwf refraction is:

  95.12: The principle underlyin.m n0ls/(p)qj/fwkrt*qkj z 9g fiber optics is:

  98.36: The critical angle in a transparent s1u( dpzss 46wfubstance 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 refraction of n = 1.5 tom6*,lf/hcdhv dou pr, //frc, material Y with an index of refraction of nu/v r,,h/ o ld*mdr/6fhf,cp c = 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 betweesy65 zot.h 2vsn a diamond and a piece of glass by observing the critical angle of the light in each material. Glass with an index of refraction of 1.52 has a critical angle2s65h ysvt. zo 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 ani,wky/bybq9y/(y *ry angle b9,(/y *yyrb iywy/qk 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 material of index ov 1bcpvp(-y 1nf refraction n. The laser beam emerges from the material and hits a target. See the accompanying figure for the position parameters of the lasbvc -p11( nvpyer and target. The value of n is:

  95.31: A beam of light passes from medium 1 to medium 2 to medium 8)/x tc s- zvfwqbc:*k3 as shown in the accompanying figure. cx*t8qb/-k:zscv )wf What is true about the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from mibt n f0 7f9os-u+-b pl5vq:rp*sf8dbedium 1 to medium 2 to medium 3 as shown in the diagram. What may be concluded -ot qdnfsfbrf + si0 *7- ppb9u58vl:babout the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path thatg *1gxz x9:boc a light ray takes passing through three transparent materials. The inxgg:9ob*x1 zc dices 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 nnu(p qo:g,/rgw/ tv3 shows the path taken by a monochromatic light ray traveling through three me qg:p( 3g /orvtnnu,/wdia.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 in gll4 (.y .g2 a* d3meow7rxbvurrass ($n_g$=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 rectangula8asc 5 eax3bt+-el :nxr block of glass al-+5a s:ex3 taebnc x8t 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 600nmikiqcz 9 u lkx7w+h(7- is transmitted from air into a piece of glass. Which one of the labeled arrows best indicates the path of the light ray afteriixqkwu-k zhl7c+ 97 ( it enters the glass?

  14.44: A ray of monochromatic light enters the right-triangular gtzv)1gq1 tv(wp+1.p8wnl*wf bnm i4 dlass as shown. The glass has an index of refrwf141d* (n)t+m g i wwqb8v1.zlntpv paction 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?