11.24: Two wave pulses travel to the right tfg, .r8:p*jflyj eg3poward a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best reprf:eg3 gj f8y,lp*jp.resents 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 surt sy7r-xz 3f9j2 ggli1face of a plastic block. Which pair of statements correctly describes the phase chang r12 tg-ylfg3jxz9s 7ies for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straigpcws,bg ev 6o9tv9 ;w6ht downward through the point labeled B in the dwpetv6,vsgw o 9;b6 c9iagram 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 whenever light is smon n 0q7f)4yincident on

  05.18: A student hold a hand mirror to observe the back oli(+/xqf 2, mfyv fkp1f her head while standing in f ki2 yqxl(1f+fv, pfm/ront 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 the wall mirror?

  14.25: It is observed that a light ray changes direction whepaz:,97uct8kzqy7n*li 8n d yn it enters a new material. Which one of the following choices is the term ltk8z7 :idu7pycnn9yzaq8 ,* best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wave t7u*aw nu8kqzhh*16 klength 400 nm in a transparent material. What is the index of refraction oqut6*khau87k hz 1n* wf the material?

  98.04: As sound travels from steel intol9za gxp zch/,9sl ;7v air, both its speed and its:

  00.01: As a wave moves from one medium to;p 3f.;wz9nb,tv ztzqu5tmxsv u 1;w- a second medium with a different index p.stv uwtx zt5wu b-9z ; ,;zq;3nfvm1of refraction which of the following wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of single frequency travel9j1ldzz 9yr2ma 7pxs1 s from air (with speed of sound 340 m/s) into rock (with speed of sound 1500 m/s). Which stadz2yz malxr9 7119sp jtement is true about the wavelength and frequency of the sound as it passes from air to rock?

  14.28: A waterproof spea*6x cb sg1w0vjker placed at the bottom of a swimming pool emits a sound wave that travels toward the surface of the water. In the water, the sound wave has a frequx6 c0bg *jsv1wency $f_{water}$, 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 wl(fu mnnl*(1o,h9+tj sjbs) with an anglenj1u*9(lb s o)tmn( jswf,+ lh 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 light is direr:tua5od w48zl8 -ao7twr:ld cted toward a point P on a boundary as shown to the right. Which segmt u5wt8azl7wo rd:d8:alro -4ent best represents the refracted ray?

  98.17: Which diagram best represent k cy-cmt.;jlh)-8aa is what happens to a ray of light entering air from water? Air is at the ;cl hck-.a8m)taijy- top in all diagrams.

  94.11: The critical angle of a material is the 5yo ygog:ezz 3:,)j;i8qsvr qangle of incidence for which the angle of refractiongq :5;qz)gjos y riy3e:,zvo 8 is:

  95.12: The principle underlying fiber4md7q 5ncnk0+soq r8n optics is:

  98.36: The critical angle in a traxuxwho s u,:+m0 me0-l7w 5vkwvp-- uynsparent 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 jf-6l) jygk79sa)jxxf-xua ; of refraction of n = 1.5 to material Y with an index of re6jx-9x-yl ajfgj )us; xf)7k afraction of n = 2.0. If the speed of light in material Y is v, what is the speed of light in material X?

  03.15: A jeweler can distinguish between a diamond and a piece of gla uje6 ams8 a;tn9.ru:sss by observing the critical angle of the light in each material. Glass with an index of refraction of 1.52 jat: msu9sa.eu8n;6r 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 th ,h- v*nbi6qaxe light makes an angle of i q-,* 6viahxnbncidence 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 materkl, k 9f jt3wc4zodrg*(j tk/0jpri)+ial of index of refraction n. The laser beam emerges from the material and hits a target. See the accompanying figure for the position paramek 0tt(j/l +dfw )3 jp 9k4zr*cjg,roikters of the laser and target. The value of n is:

  95.31: A beam of light passes from medium 1 to medium 2 thg)of :x6 /i qca.u8d8 .dtx7dsc kcu)o medium 3 as shown in the accompanying figure. What is true about the respective indices of refraction (x8odsd cu/qxaugc. 7 ti 6c f)).kh8d:n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to medium 3 as shownnduy5f/spbk9up s a.c 41b.j+ in the diagram. What may be concluded about the three indexes of refraction, nbk/.dn pby.p1 fcs 4 9+sj5auu1, n2 and n3?

  97.24: The accompanying diagram shows the path that 1lgog,mv ) st )zcub94):. e;gadeytpa light ray takes passing through three transparent tm9:g gotg,c )vad4bype;z es).)l1 umaterials. 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: opoqc3 ck3y tc+4zd,i i/1pl the path taken by a monochromatic light ray travelingcpc y,izl 41d:io tc+kp/3o q3 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 light trqmifq3fok;fi ) 6a.;c aveling 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 block of 9zue;cku ,gw 4glass at an angle oueg4,9wk; zc uf $45^{\circ}$. 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 into h b8a2txob0*c a piece of glass. Which one of thhb o atb*x82c0e labeled arrows best indicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light entekvo7xc9e0vr t-tcc.mm x)eahk81* (n rs the right-triangular glass as shown. The glass has an index of refraction of 2.00 and it is surrounceo*)(cx 9 8ntaervx 0mcm-.th1kk7v ded by air. Which one of the lettered rays shows the path of the light after it exits the glass?