11.24: Two wave pulses travel to the right tow mjcks/f.q.i )ard a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interi m)c.kf /sj.qfere. 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 gbxlz2rja *.80(xbg2, wixc p the surface of a plastic block. Which pair of statements cor*xgxzw p2a gcl8b.0j( ixrb, 2rectly describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight dm g9f3(z( suivownward through the point labeled B in the diagram shown. The ray reaches sg9umvz fi ((3a 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 occ9za s2d5w8n6 skq fvm5urs whenever light is incident on

  05.18: A student hold a hand mirror to of.bh* (k j dq)cxh/aj,bserve 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 behib)x dcjjh. (qf,hka/*nd 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 arw 2skvuty *0w+,wb4a new material. Which one of the following choices is the term best associated with this phenomenoytw0wu4 r b+s*va,2wk n?

  96.19: Light that has wavelength of 500 nm in air has wavewh l1p3o;pl+2jb) jyblength 400 nm in a transparent material. What is the index of refraction of the mat 1) 3b+jjplyh2 o;plwberial?

  98.04: As sound travels from steel into air, both its spq6o ko6i7n,isd +n )naeed and its:

  00.01: As a wave moves from one medium tenl*nby*57f ro a second medium with a different index7 nfl*be nr5y* of refraction which of the following wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of single frequenoy,x:g.im nc5 6x3 vkp5zvop: dfectx6g 0h.:cy travels from 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 sound0p6 xo 5,vye.gifx p zk3nx 5h: cc.m:odgt6v: as it passes from air to rock?

  14.28: A waterproof speaker placed at the bottom of a swimming pool emits a f;wig 7a9jo2o oayg1n*9xn,ssound wave that travels toward the surface of the water. In the water9ng os7oog* aaf21j,i;xn w9y, 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 rectangulaapo/j0 m/pj+qqq h1vty ;g .pp3m+u5wr glass block with an angle of iq +mvjpp p jt mwqa5 3h.+y/p/o01q;ugncidence 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 4h9 . hmfjwy :6tp+azaa point P on a boundary as shown to the right. Which segment f6.t :za h9hmp+yjaw 4best represents the refracted ray?

  98.17: Which diagram best represents what happens to a ray of light entb7w k5fp2ubp +(pe )nmu)3 wvnering air from water? Air is at the top in all diagramf(nn v wum)wub b3)k2p+5 epp7s.

  94.11: The critical angle of a material is the angle of incidence forunk7)m7, -5w bc- dfn bpb2dpn which the angle7 wcdkn b 7nd u-2n)mfb-,pp5b of refraction is:

  95.12: The principle underlying fiber opticvvyx,pk w;.d; s is:

  98.36: The critical angle in a trd.t smg-l38 qfansparent 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 = 1.5 +jkfg-d9 ,ht:x vi8mjto material Y with an index of refraction of n = 2.0. If the speed of light in material Y is v, what ifkj xi +,v-:8h9tdjmgs the speed of light in material X?

  03.15: A jeweler can distinguish between a diamond and p((ovxsi55wz5pwk c4a piece of glass by observing the critical angle of the light in each material. Glassk5w5 (xcwspv 4i z5(op with an index 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 the light makes an an3h (t 6ikzikr2aznv,) gle of incidence equal to (2a r36t,z)vki zkinh$30.0^{\circ}$, 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 ma nq+j*v4pc b0nd2b tp+v o65upterial of index of refraction n. The laser beam emerges from the materi p vodc+5+4 tp6pjb 0nvu2nqb*al and hits 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 mediux*;-,p*v. mnz6 y jmucqu5tc7g ki. /xjnov5 vm 2 to medium 3 as shown in the accompanying figure. What is true about the respective iu-yq*cn*gvj7 5ipmo5kv6;,xt z. /n.u vc x mjndices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 tr sz85rfpm+e,o medium 3 as shown in the diagram. What may be concluded about the three indexes +m8, rpfe5r szof refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows e a-* *sc5dz;i, qthqvthe path that 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 describesqz *ea*tq c;-dvi5 s,h the relation between the indices of refraction?

  09.34: The diagram below rlfrh4 skp0 lzx4w;) (shows the path taken by a monochromatic light ray traveling through three media.The syxh4r;pl w zl)4fkr0( smbols $v_1$,$\lambda_1$ , 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 trav wuu9xx :l: w3m4j8zeueling 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 of a rectangular b;i/mc um)xj /l).nj eilock of glass at an angle ofmli;/x. cni)u jej/ )m $45^{\circ}$. 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 600wjmm1 n7e2 ts/nm is transmitted from air into a piece of glass. Which one of the labeled arrows be2m entmw/1j7sst indicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic li toxm0oac546zz7 x 5usght enters the right-triangular glass as shown. The glass has an index of refraction of 2.00 and it is surrounded by air. Which oszt7o mz cau0 465oxx5ne of the lettered rays shows the path of the light after it exits the glass?