11.24: Two wave pulses travel to the right toward a rigid boundac)a qnx6ubl-v x0 tim2vh8:;w ry as shown. After reflection of the triangular pulse, the pulses qi-28 vx0htu bc) :6axwvnl; mwill interfere. Which one of the following pictures best represents the superposition of the pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes through ts1l;tuu9* :g sq /7ndnutf(w nhe air and strikes the surface of a plastic block. Which pair of statements correctly describes the phase changes for the refs:;wgns(u nq *tu1un/7ld 9tflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward through the point i;5gzz+2qii yu; fy 2e labeled B in the diagram shown. The i+ 5iy2;;f qey2zgziuray 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 refleo hah mhxro4go1x4: 45ction occurs whenever light is incident on

  05.18: A student hold a hand mirror to obser3vjl((3senjti nh7cy jt;xt .*5 aj 2q *c1kieve 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 mirroix .jl ct(7*13qi5e;k v3hnjceta jns(tj*y 2r 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 when it enters a new mai.gd 0ajq q))rterial. Which one of the following choices is the term best associated with this ai q0)jqd g)r.phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavelength 400 nm inirvg**ofq5 o 9 a transparent material. What is theiov r*fgo 5*q9 index of refraction of the material?

  98.04: As sound travels from steel vb mzybb6lou7/ jm97,into air, both its speed and its:

  00.01: As a wave moves from one medium to a second medium 73 qcfe,x*p zicq, *iam7uow 2with a different index of refraction which of the following wave acuf2pw,ix7* ,*m73 ic qqezoproperties would NEVER change?

  05.47: A sound wave genern p8-vd-asu (t tj a5)uy z2kx5()jbc6qch9zmated from 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 true about the wavelength and frequency of t yju mp9 )5-nzj(v5a(tzdbxkc t)acu-62s8hqhe sound as it passes from air to rock?

  14.28: A waterproof speaker placed at the bottom of a swimming pool.mm0i)jmk4av w up, 8cot)+vu emits a sound wave that travels toward the surface8)m)poj4v .uumvat c,w k +im0 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 a rectangular glal*cejc.v :xx:xn007xq k 4t/buq sd6 zss block with an angle of incid4l7jz:kqxu6 / *cs. nxdx0: xbqvec0tence 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 towa/rshs v 4pa)+ 4ie3ehprd a point P on a boundary as shown to the right. Which segment best represents the rev44ipeehr)a p s+ s/h3fracted ray?

  98.17: Which diagram best represents what happens9wn1evtx7 7 (abt enr56ial-e to a ray of light entering air from water? Air is at the top in all di( 6 e a7itv71bx5 en9tlar-wneagrams.

  94.11: The critical angle of a material is the ang:4*ss )a8dx duvo; lorle of incidence for which the anglrsv)oud4ox 8l;* :s dae of refraction is:

  95.12: The principle underlying fiber optics ileeqy5t21vi 3) mymk4/j d/ qos:

  98.36: The critical angle in a transpareteptq (np5l*oy3 +,tq nt 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 e+)asqffv2 8 m7s-giy X with an index of refraction of n = 1.5 to material Y with an indmyfa e72f -isgq8 )+svex of refraction 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 distingjp.cc9s 7jxp. m: z1d q-amm3quish 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 criti.-:97j cp1pc. j3mqs qmmd xzacal 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 the li jgo/3. ngkg4g;gx eaa.aq6 j+ght makes an angle of incidag;4qx g/gjka.en+6j 3.ggao ence 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 emorrfvs2w h:,9 bedded in a material of index of refraction n. The laser beo 9rwh2r:s vf,am emerges from the material and hits a target. See the accompanying 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 s4b 9 n- f/blig5t6t7k3cmwdpxhown in the accompanybbifpmnx657tt3 d/ckwgl 9 4-ing figure. What is true about the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium w0y xivn ogp1t;c4u/505j c rr1 to medium 2 to medium 3 as shown in the diagram. What may be concluded about t4 r0cujgin5y;co5w0p1t r /v xhe three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path thhd pb sct))20wat 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 folhp)d 2s) btwc0lowing best describes the relation between the indices of refraction?

  09.34: The diagram below shows the path taken by a monochromatic light ray tr y y)qaw/uxv2ye3h/x 6aveling through t)ayhwq/ vy 23 u6/xexyhree 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 ws.*:o8e ro0vod p p-gglass ($n_g$=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 or zmx+oc 1 -sqj7wov/(n the surface of a rectangular block of glass atwo1/ovm j7c+s xrz- q( 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 wavelengtqf*if e)hpi p7c a01x8dy.-sch 600nm is transmitted from air into a piece of glass. Which one of the labeled arrows best indicates the path of the light ray aftc )*7 pqp0cix1aydi-8. fehsfer it enters the glass?

  14.44: A ray of monochromatic light enterrvrl q/+ c+7dus the right-triangular glass as shown. The glass has an index of refraction of 2.00 and it is surrounded by air. Which one of the lettered rays +rd/ qlu+cv7 rshows the path of the light after it exits the glass?