11.24: Two wave pulses travel to the right toward a rigid boundacl wv(u/3tz7l; r zxp4ry as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best representsl(w47t;r/ p l3c uvzzx the superposition of the pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes throughbx5;(-r rjeiq the air and strikes the surface of a plastic block. Which pair of statements correctly descrirxr(5 e-b;iqj bes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straightmcf4+gpes4 +i downward through the point labeled B in the diagram shown. The ray rea4sife++cg 4 mpches 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 is incide7btj zoyv,f.dpebbqv:dw 9x (,2qp+ o,x w6y+nt on

  05.18: A student hold a hand mirror to observe therb4rrpb )7rx-5t;c y 7 gj3euz 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 wi5ygr j7b;tr p37ux-z4 )re crbll see the back of her head how far behind the wall mirror?

  14.25: It is observed that a light f5r02f).i i3lrgow:i,*h)wkp. ea8 hak cyl hray changes direction when it enters a new material. Which one of the following choices is the term best associated with this phen3 ae 0r:,.i*o) i rplhgcfai2l wwykk f58h).homenon?

  96.19: Light that has wavelength of 500 nm in air has wavelength 400 nm in a t021ac7dz,po/ byr rhd njbf4c7 w9-un ransparent material. What is the i7fnw /ndb12u rorh 0- b4azd9cy,c j7pndex of refraction of the material?

  98.04: As sound travels from steel into air, both its5cx ()t6dlt( l umagu0 speed and its:

  00.01: As a wave moves from one medi7vd3cfg51vmd um to a second medium with a different index of refragfv3v 1m d57dcction which of the following wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of singl,r j- .s(pdzblz6(ulne frequency travels from aib -(s.u z6z d(lnpr,ljr (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 to rock?

  14.28: A waterproof speaker placed at the bottom of az(7x-m wht:.xvcu3*fzj :vw t swimming pool emits a sound wave that travels toward the surface of the watewz:7zmvjf *h xt.c v(:u3t wx-r. 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 block with y . f6d4/jxqv0/vv easan angle of incidencee v4 60fjq.a xvy/s/dv of $0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of ligd0kwac ab3*d0sqay 41v (olr 3ht is directed toward a point P on a boundary as shown to the right. Which sesyor4vca0 l3d0 ( 3a1*dkqwab gment best represents the refracted ray?

  98.17: Which diagram best represvu8kz 0i 5,eu-cgf j8q6 x9groents what happens to a ray of light entering air from water? g, v9ur8 o0ikg6xu fjqc-ze5 8Air is at the top in all diagrams.

  94.11: The critical angle of a material is the angle of incidennrbdf4ixw)lbh(8jl 7z (:(li ce for which the angle of refraction is:n)8zlxwf((4 hiid 7:l jrb bl(

  95.12: The principle u0r1w;y;ntx9 rn; ljv hnderlying fiber optics is:

  98.36: The critical cf.x kg98ofcy3 877 - amuocuuy,7uzsangle in a transparent 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 yt( ll3/ laf3yn = 1.5 to material Y with an index of refraction of n = 2.0. If the speed y (tly3 3laf/lof light in material Y is v, what is the speed of light in material X?

  03.15: A jeweler can distinguish(vb6oqoorhm5 7 o;w (s between a diamond and a piece of glass by observing the critical angle of the light in each material. Glass with an index o7 bvr(qo5hoo6; mw(s 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 material. When thezzt0xj 9*vk7cbxx 5 t6 light makes an angle of incidence equaxz5*670zctvx j9 tbkxl 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 i8-2ah -d l7 6kjrgc)y2wipyti5 v nz*yn 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 pa w22knyyh ai7p85t6c-zlry-) d*i jvgrameters of the laser and target. The value of n is:

  95.31: A beam of light passes from mediq qo5; w1b(ssj*kz br4v nfm,1um 1 to medium 2 to medium 3 as shown in the accompanying figure. What is true about v1,mqsnw5 ro4 bfz;(1k s jb*qthe respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light pasdk04s0 i**xx - zkkjcyses from medium 1 to medium 2 to medium 3 as shown in the diagram. What may be concluded about the three indexes of refraction, n1, n2 a jkzdkx-0cx*i 4yks* 0nd n3?

  97.24: The accompanying diagram shows the path tham1ama ,: d 3 1vtfe.;zpg jjr*hf1g4fht a light ray takes passing 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 refr4jh a1h1mf .g1ftg:3r z*,m fa; dpevjaction?

  09.34: The diagram below shows the path taken by a moqdii7rbfszn r*/6d -y0o3nslc/) wy 8nochromatic light ray traveling throughrsz0/w 6f b7 q*ydlndn -)ioys/icr83 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 travelih:grfb*bdzi+i)v it 0 lh;x)5 ng 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 incidenmt1l ft9id/yds l2 54+1rz fdzt on the surface of a rectangular block of glass at an anglflztdd yf / d 42+1z9lsrt15ime 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 8y uu,h)6cxbn kf)qs1from air into a piece of glass. n x1,u)qf8hub 6 ycs)kWhich one of the labeled arrows best indicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters the rightex,qz5dfft36s f5d,xml0zx p4ph+b 5 -triangular 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 the light after it exits the glass? xdpz+35460qbt x e ,, m5fffzdshl5px