11.24: Two wave pulsegm, fcim4a6 l;s travel to the right toward a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one ma ,icglf4;m6of 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 of a pj*7mg 1pnspp3lastic block. Which pair of statements correctly describes the phase changes for the r pmpj71*sn3 gpeflected wave and the transmitted wave?

  12.02: A ray of light pas4j:xqca*kdnf7 qu /f.*8e a ksses straight downward through the point labeled B in the diagram shown. The ray reaches a flat mirror placed at an angleqk7/xke: 8 f *uf.qcn *daja4s $\Theta$ 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 i; xyb;w qp,rx7,a;by is incident on

  05.18: A student hold a hj (s/d -0spcfvtz84l.ek+p5 0zsf cccand mirror to observe the back of her head while standing in front of and looking into a wall mirror. ccsv ejtsc50plzcf.8/0d-(pf zs+4 k 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 ch5s8tvk 0 8ddt(x; tuveanges direction when it enters a new material. Which one of the following choices is the term best associated ev tt;88ddtxsu5 v(k0with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavelength 400 nm in a u o*ao,:n) jzotransparent material. What is the index of refracti*) o u,zj:oonaon of the material?

  98.04: As sound travels from steel into air, both its speed and o/ikqn 0uyk ugcf43l8wso,4d ey:f 88its:

  00.01: As a wave moves from one medium to a second medium j z ma;rza*+.6blvq3b with a different index of refraction which of the followingb6q3;l mza aj*bv r.+z wave properties would NEVER change?

  05.47: A sound wave generated from a tuninkmn10x7q;6swk72ph* wyo p jm g fork of single frequency travels from air (with speed of souq0 2m mwpo1p6 w7jx k*h;7nysknd 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 to rock?

  14.28: A waterproof speaker placed at the bottom of a swimming ix7tpc.k -pm1 hf4e/htv)3 *ikf0gxdpool emits a sound wave that travelh174p/.hfgte vximk)*dt -c0 ix3kfp s 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 rectftsc:n(l 4r5pangular glass block with an angle of inc5s: fctn(4lrp idence 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 j zqk)q 4jjm*.P on a boundary as shown to the right. Wq)jz k*. mqjj4hich segment best represents the refracted ray?

  98.17: Which diagram best represents what happens to a ray of light entwv tl87jh j 4mi+k(9rxering air jk847ijrv(lhw9 m+x tfrom water? Air is at the top in all diagrams.

  94.11: The critical angle of biss*-9c q-h i8pkjff fq++, ta material is the angle of incidence for which the angle+qj,-f*9 ikhi bss-cfq8t f+ p of refraction is:

  95.12: The principle underlying fiber optics isn p (+ig)v p9vrk- hwx0;bpf:j:

  98.36: The critical angle in a transparent sub9fxih5/zj z;k stance 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 refractiafig:q,3kjxaw)j11:w cx06 d jnwy g+on of n = 1.5 to material Y with an index of dj+:cw11 )ajkfijaxq gg: y03nww ,6xrefraction 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 diamond and a piece of glass by e l 39*:pfy5l 0f3mxehkugtzftj570 cobserving the critical angle of the light in each material. Glass with an index offfyetc07jlu hp3*9lmk 5 ez3xtf:5 g0 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 materiaw(yxg4qrusrik7g; ty (6v4,sl. When the light makes an angle of incidence equal( r;g4,ry4tsxs76gq u(iykwv 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 indlu 2i*ldh*c; :sp)plzb rk,1 ,a-cxhwex 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 nb)ih*zadpl:; lwh, xc *s k,-ulc pr12 is:

  95.31: A beam of light passes from mediuv , n/i8j5klytzp -v;tt o0sc/m 1 to medium 2 to medium 3 as shown in the accompanying figure. ilzs/;t5 o/ n p0v,tjy8tcv-k What is true about the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passesd+83lx 2citz /uoi3k h57axnc from medium 1 to medium 2 to medium 3 as shown in the diagram. What may be concluded about the three indexes of refraction, k/ cu3i t 5dl3cxnohi+a78 x2zn1, n2 and n3?

  97.24: The accompanying diagram i z5yqi4)/xtl shows the path that a light ray takes passing through three transparent materials. The indx /i)5lq4tizy ices 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-, vsr zdby,0r by a monochromatic light ray travelinsr0y rd- b,v,zg through 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 traveling in gla ;c./ el+z(xq osvpfisez2 k6;ss ($n_g$=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 block of glx,ymdi8 ,a 1prr4pe d, a.-tkkass at an angl.a tdrprk- 1md,kp8e, i4 ,xyae 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 transmitted d,bw)u icb,q.from air into a piece of glass. Which one of the labeled arrows best indicates the path of the light ray after it ent,b u.,iwcq )dbers the glass?

  14.44: A ray of monochromatic light ennhesi *8q d whj.jd4.1ters the right-triangular glass as shown. The glass has an index of ref 1ndhq.h 84.de* jiwsjraction 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?