11.24: Two wave pulses travel to the right toward a rigid xqw 6ektel -gwn. :t2 l:d+q7xboundary as shown. After reflect xwtg xl+. 2e qw:7dkeq6l-:tnion 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 the individual pulses coincide?

  08.30: A light beam passes through the air and strisr6nd84w;gr6a q 2kudzxmosfj +)5* akes the surface of a plastic block. Which pair of statements correctly describes the phase changes for the reflecz+n)qaoax6s4 r5u8rf6*;w dd jm2g ksted wave and the transmitted wave?

  12.02: A ray of light passes straight downward through the c22 gcr4ttke4icoe 8. point labeled B in the diagram shown. The ray reaches a flat mg 2i 2e ccck8reot4t.4irror 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 in)2t vhta1bsxt*s d16x cident on

  05.18: A student hold a hand mirrgfb1,kh+awr7 mq; )xf3sj3vpor 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 behi;g,v b7a1s3r+ 3fp wxkqmh )jfnd 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 en8 kb5. mwdz.gm*hu r2qdefi28y; 0zchters a new material. Which one of the fodr*gqzhcfw mdu28hy z8 b.m. ki;52e0llowing choices is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavelength 400 ns:uw)xn99 4+a*xkz uzl epyi5m in a transparen)zyu*w4s9le+ azixnu5 :xk9p t material. What is the index of refraction of the material?

  98.04: As sound travels from steel into air, bo rodf- 8 llvan5+ at4a*g.h,hgth its speed and its:

  00.01: As a wave moves from one medium to a second medium with a diff):xtksdrg9ia3vxn s;5)nxh293gymn w g: n9kerent index of refraction which of the followi s3kn nx x9sgn :vt2)kg39x;hdg5 nr:wya9mi)ng wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of single frequency travels fr;;z 9 ;qargo3y2qxrvt5 da 7xdom 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 passes from air toryg z;xaa2 v5qdt;; dqx 9o37r rock?

  14.28: A waterproof speaker placed at the bottom of a swimming pool emits a soux qfr16*kkkb i-tl(,ttrys50/ x j-dqnd wave that travestr bd6(5*xqxk,1q- /0 -tj tlfkk riyls 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 glass bm/ uqilz +4*yllock with an angle of incidenc/il*z y4mul q+e 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 as shown to-)/igr+9no;u0cl+9 x avd ldav vpf7d the right. Which segme n0 c avlu-+dv x/;pi9r9dlf+vgd)ao 7nt best represents the refracted ray?

  98.17: Which diagram besti;t:q2pkn5 k swwv;5aln, mv ( represents what happens to a ray of light entering air from water? Air is at the top in t(l 5qn;;nvwkm2 5ipskv:,waall diagrams.

  94.11: The critical angle of a material is the angle of incidence for whium h2v4 y95repch the angle op9 m25uhvrye4f refraction is:

  95.12: The principle underlying fiber optics .mmpogp4ug;: fa0 *yiis:

  98.36: The critical angle in a transparent substance surrounded bylc/l+ 8h-wofs5y v7ob 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 maten* ei23oo)czg)u zr7, g m-paerial X with an index of refraction of n = 1.5 to material Y with an index of ro*7)z e,oru2p m g-ni)3acezgefraction 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 diamonmj)s4 8jqb 4,hucc9 utd 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 angu)s4jt94cm8 cbjuq,h le 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 makewj a:,0 h)lac *07xl,teldcsbs an angle of incidence equal : tj*c lad7sl)exw,0 cl0,hba 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 embed0 sdmv:9po3o tdle;x6ded 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 position parameters of the laser and target. The value of n x:vdeo6 p;d0otlm s93is:

  95.31: A beam of light passes from medium 1 to medium 2 to me0 jld-np,)bkjdium 3 as shown in the accompanying figure. What is true about the respective indices of refractijn,-dpjl) 0k bon (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to medium 3 a mndp20h6gm r.j c- ;ms,4mxips shown in the diagram. What may be concluded about the three indexes of refraction, n1, ix.nsm64p2 ,;ghm m -mrp jd0cn2 and n3?

  97.24: The accompanying diagram shows the path that am5/ v7e o*nci,dpxs3)e mhpmm2+v2ne light ray takes passing through three transparent materis,po5ndi e/xp2 m+mhve37vm )em 2nc*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 sn1f8x-ne;akjvoj2e22 w iu6the path taken by a monochromatic light ray traveling through three media.The syvjj2e26 ;2es 8 nxf oa1n-kiwumbols $v_1$,$\lambda_1$ , 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 g5-6s hq2-ag1 2rclyq z9exruvlass ($n_g$=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 duigmex+ b*+(5vu r yvk 7v(z(a rectangular block of glass at an b+ + yvdu7zxu(vvm5(*r k( igeangle 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 waveleng3 zz:ceoy 7boq. 6cki+th 600nm is transmitted from air into a piece of glass. Which one of the labeled +7 y 3e 6zoq:icobckz.arrows best indicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters the right-triangulu.b .kimo4/p mar glass as shown. The glass has an index of refraction of 2.00 and it is surrounded by air. Which one of the lettered rays shows the path of tkio.m .b/upm4he light after it exits the glass?