11.24: Two wave pulses travel to the right toward a:g*i-.i n9n c4 az;q*hw ,)ebkcgxjrm rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pict* wgaich4xem)z9 :b*k j iq,c-;n.rgnures best represents the superposition of the pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes through the389zva jjhx v)l3zo d:;lzvc. air and strikes the surface of a plastic block. Which pair of statements cor )lj j9z8cahd.vzxovl3 :;zv3rectly describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downdxj m7(wdh4ziubc538ov9 z a3 ward through the point labeled B in the diagram shown. Td(c7dhu 3w o 4xbim3z89zvaj5 he 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 qvn 6qpy b wo9tzo)0(6is incident on

  05.18: A student hold a hand mirror to observe th )hp.r:18 lc)vyy dnqf/6pbkhe back of her head while standing in f )n:6fhbprcqy8h )y1/.lv dk pront 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 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 6j;avq4eu/spmaterial. Which one of the following choices is the term best associated we 64;pq /asuvjith this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavelength 400 nm iny0dpq. +/sdtf a transparent material. What is the index of refra+yfsd.0p td/q ction of the material?

  98.04: As sound travels from steel into air, both its speed and itoc6d 37)buefv+b fk3q z zo:o4s:

  00.01: As a wave moves from one medium to /+phkbqlj:ik ,nkl 2x:8s wu5a second medium with a different index of refraction which of the following wave properties would NEVER chaj /2kx5 bklhlqs,+k :u:i8wp nnge?

  05.47: A sound wave generated from a tuning forfiipc/1 +s rh3(.vfpo zax,2pc u:du.k of single frequency travels from air (with speed of sound 340 m/s) i/s:, z.3x1rvci.ah+ po fu fci2 pu(dpnto 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 speaker placed at the bottom of a 2fs*sgn;s2zc ,on9ab swimming pool emits a sound wave that travels towa2fsn29zabn*s; c,gs ord 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 28* 8tdm xjzosfj3ul, white light strikes a rectangular glass block with an angle l mtjf8,zs2 o3xu8dj* of incidence of $0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of ligosld* a8ncrt -. .y+f7s nfa2vht is directed toward a point P on a boundary as shown to the ri d-n. *vs7f n2.f+c8rsayotalght. Which segment best represents the refracted ray?

  98.17: Which diagram best representsb :gfgh9t 2xnhd.+t9a what happens to a ray of light entering air from water? Air is at the top in all d xtad2gf9t9 hh:b+.ngiagrams.

  94.11: The critical angle of a material is the angle vrt(wv r278ni stt5*yof incidence for which the angle of yr7sv tr8wvt ( 5*ni2trefraction is:

  95.12: The principle underlying fiber optics iu+ )ob lz40 9flvfjirp (,cbx +nork(/s:

  98.36: The critical angle in a transpare3p7ctif +so7 nap9i*uo /zk7 tnt 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 travels from material X with an index of refraction of n =i* 66n8agxn-w gnd kv/ 1.5 to material Y with an index of refraction of n = dn-agn6gnxk8/ *w6i v 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 betwe 2etgo;-upt f(kuy5p*en 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 angle of y u5fppt u-to2* ;kge($41.1^{\circ}$ while a diamond with an index of refraction of 2.42 would have a critical angle of:

  05.26: Light shines from air intoky32j.x blk5 ylclz ;* nj)s*a a clear material. When the light makes an angle of z xj2 k;) yy bkj*35.lslacl*nincidence 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 refrayse (vei,a e(dx:kt27ction n. The laser beam emerges from the material and hits t eaexsk e2v:7,d (yi(a target. 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 medium 2 to medium 3 as shown in a1xgfm4urw8 /m6-blt the accompanying figure. What is true about the respective indices of refraction (rm bxf8 t6wa4gm/1u -ln1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to w75 )zz+dnd oqmedium 3 as shown in the diagram. What may be concluded about the tq ) zwdn+zdo57hree indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray takes passu1 whb;j+zk s;g*kc9 ding 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 bekg; 1 *9su dwkzj;+hbctween the indices of refraction?

  09.34: The diagram below shows the path su6xre+eh95hr vm ,q 9taken by a monochromatic light ray traveling throu eh6 uemhrxs 9q+,v95rgh three 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 travelfou talnymsa.l 2 q06dl*.,d9ing 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 djq owhb9dbm1j:rc y4wsf2/ 0m:zm4 1 of a rectangular block of glass at an angl sdf wqbhm:1wy0d2/zjb rm m41c9:j4oe 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 60 0mzw:yh,/nr a0nm is transmitted from air into a piece of glass. Which one of the labeled arrows best indicates w0r/z,:mhna y the path of the light ray after it enters the glass?

  14.44: A ray of monochromaticpc)gba4c m /q) light enters the right-triangular glass as shown. The glass hpcc4 )m )qgab/as an index of 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?