11.24: Two wave pulses travel to the rigjr i2 lv76w 6eka10atqht 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 center0i7jeal 16kqar62 twvs of the individual pulses coincide?

  08.30: A light beam passes through the air and strikes the surface of a plme:og+n9j5f 29q pm ewastic block. Which pair of statements correctly describes the phase changes for the reflected wave and the transmitted wj9: qem+mgfnwe52o9pave?

  12.02: A ray of lighrjsa5foo7/r -t0 xgw9d +,amot passes straight downward through the point labeled B in the diagram shown. The ray reaches a flat mifasg7w 5/+mx j-tro o ador,09rror 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 ligx -xlkf3yg e2)j; gaqd3m (pl(ht is incident on

  05.18: A student hold a hand mirror to observe the back of herox9m/q* p wk.rtjh0,0ds5ieskhv 1d, 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 her head, she wil09 k x/ 5w.p ,kmsvir0tsd jh,1hq*eodl 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 a new ma+6 u(ifuolz0pj5 psf/d:r e d3terial. Which one of the following choices is the term best associated with to/e(fu 6puszd:0ldfri+ 5p j 3his phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavelength 400 nm in a uyla 08+5m34nbs trjq transparent material. What is the index mby5l au480q n ts+jr3of refraction of the material?

  98.04: As sound travels from steel int11y obha0:x exo air, both its speed and its:

  00.01: As a wave moves from one medium to a second medium wiu k-qxhky: +u*-be5ii *u umse/zc2x;th a different index of refraction which of the following wave proper e s+kxi*k5;ch u*q : -myuu2zei-b/xuties would NEVER change?

  05.47: A sound wave generated from a tu) +hbi0 g6f x8:tcdyluning fork of single frequency travels from air (bgy lc0 8dt+xfih): 6uwith 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 sound as it passes from air to rock?

  14.28: A waterproof speaker placed at the bottom of a sw5 k8cwo(dz)8lfdccjb u:v 9+fimming pool emits a sound wave that8d+v9f cw c)bo 8:ju f(dz5lkc travels toward the surface of the water. 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 light strikes a1vw.: ehwtem5p m/ xxhy2 ):xz rectangular glass block with an angle of incid:yhevmx.)x/ thm:xpe2z5 w1w ence 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 showt8iyz vm )+w1 txrso/4n to the right. Which segment best represents the refracted ray?r4s8iv)/mttzxo+w 1y

  98.17: Which diagram best represents what happens tvz3/ c;jpmui1o a ray of light entering air from water? Air is at the top in all diagic mz3u;j1v p/rams.

  94.11: The critical angle of a maw 4nxns047c3m 1 .m hkrks+qcsterial is the angle of incidence for which the angle of refm k4cc4hqn 17xsrkss.m3n + 0wraction is:

  95.12: The principle underlying fiber opti-wkjuw * 2xt9rcs is:

  98.36: The critical angle in a transparent substanczx8/9g jtgs v-e 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 ofw2bqy 9km56wn l )a7vd n = 1.5 to material Y with an index of refraction of n = 2.0. If the spee wy)v kad2 b9q6nl7m5wd 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 iz2z4 olb5tnhhuh+ 6g 68yle 9of glass by observing the critly48hh9ghl2n i o6ztz ue6b+5ical 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 a clear materiahj5 x2) xmh d,jr2ovmc,-jd x7l. When the light makes an angle of ,xm2m d-xd5o)vx, jh7r chj j2incidence 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*cop c qt/a,5 .h;e2lafhp4xf of index of refraction n. The laser beam emerges from the material and hits a target. See the accompanying figure for the position parametc.;xc4a /5l of 2pp aeq,*fthhers 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 s7dbwqil5. ka3y7 7gunhown in the accompanying figure. What is true about theg5k73 .b7nyq7dwali u respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium v me*yh)k**drs ;nzt/2 to medium 3 as shown in the *z k d;)mvsrn *e/th*ydiagram. What may be concluded about the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray takes paggsg-zj.o; 8 ogg+b a:ssing through three transparent m.b gog8ggaz j g+-:so;aterials. 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 taken by a monochromatf(n-qvl(l* 03 ol . 7qpazzyegic light ray traveling through three media.The symg. ye( (-ovlpl*q0alq 3nfzz7bols $v_1$,$\lambda_1$ , 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; jwn84;wo dtbf det02 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 thh7 ngln:ej *j(xncss58n60(ktj yf*l e surface of a rectangular block of glass at ankx j t(nh8je g:y7(*n *nsllsnj05f 6c 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 wavelength 600nm is transmitted from air into a pib2)dlvzu +dl; ece of glass. Which one of the labeled arrows best indicates the path of th; bl)u lddv2z+e light ray after it enters the glass?

  14.44: A ray of monochromatic light enters the right-triangular 3*lo wo+smrs+ glass as shown. The glass has an index of refraction of 2.00 and it is surrounded by air. Which one of the letters3o +mr +wl*osed rays shows the path of the light after it exits the glass?