11.24: Two wave pulsi9-k)p dj0 o r vu2akwbf xbcw/,l2()nes travel to the right toward a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best represents the superposition of the pulses when the centers of the individual pulseskrja2n lp) (2vxb ik -0),bfdu9cow/w coincide?

  08.30: A light beam passes through the air and strikes the surface of v+9iwo g9-+sf qb0tewa plastic block. Which pair of statements correctly describes the phase changes for the reflected wave and the wbeviqt+f+0s 99-gwo transmitted wave?

  12.02: A ray of light passes straight downward through the point labeled pi2wyn;lo 3ess4zm,jh 3v*: qB in the diagram show*n,ploh w2e ijs3qy;:4sv3zmn. 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 whenever light is incident o6)m/xl3f.vw(s qf ny cn

  05.18: A student hold a hand mirror to ob2z +dh*jtkpj;serve 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 behind herzdkjh *p +2t;j 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 t;gg *bf2ej/a7 ezn )cdirection when it enters a new maan*;g f cge2)7 etb/zjterial. Which one of the following choices is the term best associated with this phenomenon?

  96.19: Light that has wavelength of w2d mybpa1kr pud- m -70v/4sf500 nm in air has wavelength 400 nm in a transparent m2kmdu pbmrsp7-4w-f0 vd/ 1yaaterial. What is the index of refraction of the material?

  98.04: As sound travels fro*7fkx9xflg)a5dg ;7b vyl*d cdd zt:;m steel into air, both its speed and its:

  00.01: As a wave moves 22mcqft8mlbj4 do5 0lfrom one medium to a second medium with a different index of refraction which of the f20q8b 5mjfd4lomtl c 2ollowing wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of single frequency wygjkx;he0q5 r)ywf odj9t pq: q2*/1travels from air (with speed of sound 340 m/s) into ro 09 qhjwfpe/qgyd :r ;tk*)5x2wjqo 1yck (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 theq63 x0l brry; 1fkwe(f3 4elfo bottom of a swimming pool emits a sound wave that travels toward the surface of the q xrblfw4 (k36fre;1yo3fel 0water. 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 lr/ebi4k5)gibhrmgx 8rc u295 p;i* hkight strikes a rectangular glass block with an angle of inci*k;r4)9ri g h5pkcrim2ieugh5 b x8/bdence 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 P on a boundary as shtvj -5:fn8ehxm ffa.y sj 6)/lown to the right. Whicyxe)ffnj sah :vm6 f.58jlt -/h segment best represents the refracted ray?

  98.17: Which diagram best 7 e2qhcc4hkh4 y.9 / ybthm,,euyp1wdrepresents what happens to a ray of light entering air from water?ew c.,qy ey hkc u24ph7y/m hb,d4h19t Air is at the top in all diagrams.

  94.11: The critical ail(4b y +yflez0zs4n.ngle of a material is the angle of incidence for which the angle of syfbn+ lez(.z4l40yirefraction is:

  95.12: The principle underlying fiber optics is-ggdpwlop0f+57 ye4 p:

  98.36: The critical angledlo/;jv) la08 bfisww+5ot)h/ ej yv9 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 mateow ,h)hxei/hh0m,0;t bhj3dprial 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 material Y ; 0th )/eho,dhxh mbp30wh,jiis v, what is the speed of light in material X?

  03.15: A jeweler can distinaq.p9n+c 9g+f feq hn*guish between a diamond and a piece of glass by observing the criticahef+q f+a q*n9cgpn.9l angle of the light in each material. Glass 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 -z2(cvkp9. )r5g cs b 1rjnmmw-i,szq a clear material. When the light makes an angle of incidenc(icvs2g)-zkjcz- qbp m 9rw,1msr5 .n e 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 material of index of r l6f/6u+ fqsvwqy;i1wui3em/efraction n. The laser beam emerges from the material and hits a target. See the accompanying figure for the position parameters of the laser and targq6usq //vwu1w6yleii f+3;fm et. The value of n is:

  95.31: A beam of light passes from medium 23kh q1ict.vg 1 to medium 2 to medium 3 as shown in the accompanying figure. What is true about the respective indices ohi2q3v1ct gk. f refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to medium 3 ad5sh, jk.p8y3t 9 wzf,poo ad8s shown in the diagram. What may be cs5a,od3po88 zy9kf,.pdh j t woncluded about the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanyin.dfkd9ro bc/rnff *jt.5 miv0 :ri8z7g diagram 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. Which of the following best describes the relation betweend f krfz:ir /0.j9o7c.b v*ndrt f5mi8 the indices of refraction?

  09.34: The diagram below shows the path taken by a monochromatic light mye nk b5*m;dlbw- l99x:7ddhp*y ss,ray traveb** exs b,7-wd9:dm5py;lmsdnl9h ykling 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 lighte e sffeju g0a2)w9w1( traveling 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 sur. fs; xtqai5e jgzy gg;29gz(6face of a rectangular block of glass ixg;g2g5 tf y6qz9 .j;s(zaegat an angle 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 wave 5ty:km vi51w.6yw y1r um*yjulength 600nm is transmitted from air into a piece of glass. Which one of the labeled: vm6y ukuwy1*w1 .5imjy ty5r arrows best indicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light ent f ni834-;opby;gh57qy iebqvers the right-triangular glass as shown. The glass has an in yyv7b; q -gb3fehi4pon 5i8;qdex 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?