11.24: Two wave pulses travel to the right toward a rigid boundary as shown. Afg83jx+c ) kwvma4n*1b d8cq)ocbiwg 8ter reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures8+gb1wgnqvc 3d )8 okabmw)c8x* 4icj 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 oeq*c-9*0 .wm8dqjwjgh 0eg wif a plastic block. Which pair of statements correctly de d gqwhcjgi 8e0ewm*.j0*9wq -scribes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward through the point labeled )av ,fj; 0rajz y1;yanB in the diagram shown. The ray reaches a flat mirror placed at an anglayr0 1jfnj,azy);;ave $\Theta$ 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 ligyp0k 4f5 zi41-jwhrztht is incident on

  05.18: A student hold a hand mirror to observe the back of her head while standix5)m. h7ksuuku)8q1zeoxc :cng 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 will see the back of her head how far behind t:q sex)ucm8zkk cu)uo5x . h17he wall mirror?

  14.25: It is observed that a light ray changes direction when it e6pnlq unu(:*b d)a0uq nters a new material. Which one ofuu q nbun( d:q0ap*6)l the following choices is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in qh+v( 9nat:z luh;1et air has wavelength 400 nm in a transparent material. What is the index of rezlah: t9u qt(vhen;+ 1fraction of the material?

  98.04: As sound travels from steel into air, both its s.4e: np(xujvcm- mmqjpo (t)gi:. 5:yh)oga apeed and its:

  00.01: As a wave moves from one medium to a second medium with a differh0fh-ew)odyx79diu9 tj7t 4vent index of refraction which of the following wave pdvth uo97xjy)wh97fd0e- ti 4roperties would NEVER change?

  05.47: A sound wave generated from a tuning fork of single frequency travels froy/2cpub fgj)y s./ at5m air (with speed of sound 340 m/s) into rock (with speed of sound 1500 m/s). Which staf.t2)j/ pbgyy5 cus /atement 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 lce qg fk7+8p8nhang 0t-dl38a swimming pool emits a sound wave that travels toward the surface of the water. In the water, the sound ql c0g -8eg+tdnnhfk 88 a3pl7wave 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 strikf 8c x5deyl7( s-gyj/ges a rectangular glass block with an angl g 5 l/ysdj-ce(yg8f7xe of incidence of $0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of lightni3 i6p wsw+ e:bu.ep -5jk6/xxh*ddn is directed toward a point P on a boundary as shown to the right. Whicx-nd3edhxe s+jii w*/u6p.bw:56np kh segment best represents the refracted ray?

  98.17: Which diagram best represents what happens to.92ecy 0b*)jkaqzo) g vbp5g8 qvyka. a ray of light entering air from water? Ajqv.0 5 qo b.gvge)*28yazkka b9y)p cir is at the top in all diagrams.

  94.11: The critical angle of a material is the angle of incida93o es x rr6hg7sy e0f3q.)vissq5z: ence for which the angle of refoay zq5eri6sqg s)0v .: s 3x79r3hsefraction is:

  95.12: The principle underlying fiber optics -,ix903pv rasbpg;m k is:

  98.36: The critical angle in al7pei r6;* itpwh4k /e,b9mf g 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 mate l52v9 kttk5n:6+n7 gb cwfbzarial X with an index of refraction of n = 1.5 to material Y with an index of refraction of n = 2.0. If the speed of light in ma 7tlbgb:nvkz c2+w5a5 n9ktf6terial Y is v, what is the speed of light in material X?

  03.15: A jeweler can distinguhp4) kn2 ,x q-ak zlcs,ao2w.aish between a diamond 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 angkwa -42qzaol .p,n) sack ,hx2le 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 mgnbi v4lj,0 c8(kom0 iakes an angle 08ovikmcigbl,4(0 j nof incidence equal 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 mal*sic 8sr(vim+qq k*dp;(r5 k terial 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 valk;k s(r(qs*iir +ml5pd c8*qvue of n is:

  95.31: A beam of light passes from medium 1 to medium 2 to medimos5n pceg7*m,:5 gy -if ew4uum 3 as shown in the acc7 iyfwun* g,-s5m g 4e:epm5ocompanying figure. What is true about the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to medium 3 as shownk3yfas.0-du2 rgc 1h dld).mh in the diagram. What may be concluded about the three indexes of refraction, n1, n2 and n3? .h2-lm du1asg)30dkf.h c rdy

  97.24: The accompanying diagram shows thamdi(a tm-3.a e path that a light ray takes passing through three transparent matea(. 3 ammta-dirials. 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 the path tamsub) -d2c1 i2flrz(nken by a monochromatic light ray traveling through three media. u z1sfmi-2nd( 2crlb)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 glezy 304bzs8 hce322 wtqane 8jass ($n_g$=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 (9s5bw p1e c,ug5ju ebthe surface of a rectangular block of glass at an sc(,g b 1bpjuwu5e5e9angle 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 600qihq5dm p1nstnar. + d)q4-yybs6b21nm is transmitted from air into a piece of glass. Which one of the labeled arrows best indicates the path of the light ray af+qhd1b m rd4 qi5by26)s- .s 1pntanqyter it enters the glass?

  14.44: A ray of monochromatic light enters the right-trianguw;vbi2d swn(j4 s4l r +hmkym2b(as 6p8 9zyw0lar glass as shown. The glass has an index of refraction of 2.00 and it is surrjsi rw9 a+z;v8sy0wmd2 b4p4lswk(nh6 m b(y2ounded by air. Which one of the lettered rays shows the path of the light after it exits the glass?