11.24: Two wave pulses travel to the right toward a d:wb ol6hr(us +m3(mja b-rz; rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of tld3;h(as(b r :o m-ubmjwr +z6he 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 surf57ywdx2tc +cl fx*uz l(7yx+i ace of a plastic block. Whic*7uylwx2 xz 7+f(5 tc+xid clyh pair of statements correctly describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light pawtqth i3:qk7op(y*x)n d2 j g4*w8 zohsses straight downward through the point labeled B in the dt * yqwhdgop)h(k83w4* tz7 nq2j: xoiiagram shown. The 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 wheneverv+3ydehg dj.0y 6z0w a light is incident on

  05.18: A student hold a hand mirror to observe the back ofcq6r/sl *;at cesv9 +0paftn h*42 -cln.qxsz her head while standing in front of and looking into a wall mirrorzal p6+x s0 /e l;n*qqc t2*-9cn4rs.sftc vah. 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 lightlc sch+j62n *d ray changes direction when it enters a new material. Which one of the following choices is the term best associated with this phenoh +d2 jclsn*6cmenon?

  96.19: Light that has wavelength of 500 nm iaab r55hwm,(tiz w) 3vn air has wavelength 400 nm in a transparent ma 5iw hb)w(a,mvr5 atz3terial. What is the index of refraction of the material?

  98.04: As sound travels from steel into air, both its speed *9h 0yq/fhonj)j ef6zand its:

  00.01: As a wave moves from one medium to a secondty( :sh4c6s,rw yrj0dnt:ak9s4o gf1 medium with a different index of refraction whichsjy6wo fchr as1tr:(g 4n,9k0ys 4dt: of the following wave properties would NEVER change?

  05.47: A sound wave generated u123iul0wrathgewsw lbu/e.6 0 2x d1from a tuning fork of single frequency travels from air (with speed of sound 340 m/s) into rock (with speed of sound 1500 m/s). Which statement is tr/ 1eu6wbgs1rxl awhltd30 ui2.ue w02ue 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 pool9di*r tfy:+axidoj 4y/w:+ rf emits a sound wave that travels toward the surface of the water. In the water, the sound wave has a frequenc/9w a f:i4+jdt:+xroydy*fir y $f_{water}$, 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 rectae s0ebtowqm/y;e/w9 0 ;zj ,gqngular glass block with an angle o/w;/bqsm0e;jzt w9qe egy,0of incidence 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 directe cf-ci ,-cq (ud)mcfoo7rxs* 1d toward a point P on a boundary as shown to the right. Which segment best represents the refracted ray*,codf(-o-mqicus 1)7 fcx r c?

  98.17: Which diagram best represents what happens to a ray of light mdr)7f lr(f(-zd:dq8 p c/rafjpry,*entering air from water? Air ir/ (c8(df lprf ryrqj,7ad -fdzm)*p:s at the top in all diagrams.

  94.11: The critical angle p cjus+rm-wt-.fy5 6f8xngyv ,wl )+u hnx2n4of a material is the angle of incidence for which the angle o-xpf n+c5. rn mf)8wynjw-h6x ul u4+gv,ys2t f refraction is:

  95.12: The principle underlyii knws 3i7pw+4ng fiber optics is:

  98.36: The critical angle in a transpares4r2kslk9-so yu, qpswu,nlo3m2 ./snt 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 inde2ai jrlr2lq* e67 .tqzx of refraction of n = 1.5 to material Y with an index of refraction of n = 2.0. If the speed of light in material Y is v, what is r76r*2q2e.lztaijql the speed of light in material X?

  03.15: A jeweler can distinguish between a diamio) t f2u3fsq*ond 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 anglf )*qsifu2 3ote 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. Whe4kku ir8y9 ci:l;nn3u n the light makes an angle of incidence 3u8i:4i uk;cy nrkn 9lequal 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 refraction ml07 (1g4pr6md8nx 6 4c hawr hos.iagn. The laser beam emerges from the material and hits a target. See the acco7l4c x04w g6i.8apdgnas 1 mrmo(h6rhmpanying 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 n a2g;o8(ae;pzolpj7t hziv8z b6 4flru 50 5cthe accompanying figure. What is true about the respective indices of refraction b 8j;p6vgo 042tnaairzolfh5ce; l78u z5(p z(n1, n2, and n3)?

  00.14: A beam of light paxiot h74h+4m),z+rmlq oc6 dz sses from medium 1 to medium 2 to medium 3 as shown in the diagram. What may be concluded about the three indexes of ti, +zmo76q mc)zholxhr4d4+refraction, n1, n2 and n3?

  97.24: The accompanying diagrak rtqufqam;o3s c a4:0 c *w.*8wqb(erm shows the 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. Whichf ;rc :4**a.w o8ak3qs0qq ewrtucb (m of the following best describes the relation between the indices of refraction?

  09.34: The diagram below shows the path taken by a monochromatic light ray trrybfv7g- kd 01c:lx8q aveling through tl7d:fvcb0-yk 1rx g8q hree 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 glassapg nwtgz;te km/t+yo,6n9 36 ($n_g$=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 icu kb6dxu r8our0;/s et+n; 3sncident on the surface of a rectangular block of glass at an angle orx; s/8t0uu+ dbsrce6 k;uo3nf $45^{\circ}$. 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 from air into0hj a 0o9 opyc4iy;2z xmb:8okz(:ruw a piece of glass. Which one of the labeled arrows best indicates the path of the light ray after it enteoz0c9rxwp2by oui:8m :;4y hjk az(o0rs the glass?

  14.44: A ray of monochromatic light entuvab/ma) 1k5r ers the right-triangular glass as shown. The glass has an index of refraction of 2.00 and it is surrounded by air. Which/5mvaar 1 kub) one of the lettered rays shows the path of the light after it exits the glass?