11.24: Two wave pulses travel to the right toward a rigid boundary as shown. Afl8e65.p2w eo; p +hkllfozy6dter reflection of the triangular pulse, the pulses will inter.5lopo;ylp8 h6 efd +ek 62zlwfere. 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 t6oc:s3xb yqwi j3 ,j1qhe air and strikes the surface of a plastic block. Which pair of statements c x,1sb33:jqcwoyi q6jorrectly describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward througqw +9ijc rxxi/**u zv8h the point labeled B in the diagram shown. The ray reaches a flat mirror plawi c/xz+uq8*ix rv9*jced 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 refle e(aio bb+;ze3ction occurs whenever light is incident on

  05.18: A student hold a han8.*oaxzk, vkvd mirror to observe the back of her head while standingvx8zo,a*kvk . 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 the wall mirror?

  14.25: It is observed that a light ray changes directio.hn 4/xvyde c2n when it enters a new material. Which one of the following choices is the term best asse.4y2x ndvc/hociated with this phenomenon?

  96.19: Light that has wavelength 90*ap6nfribr of 500 nm in air has wavelength 400 nm in a transppinrf 96b*0 ararent material. What is the index of refraction of the material?

  98.04: As sound travels np,yrh28oz .pu-* ton from steel into air, both its speed and its:

  00.01: As a wave moves from one medium to a:hn( rjsl;4pw second medium with a different index of refraction whichl4rhj;wsp:( n of the following wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of single frequ u4 :p;buqk(i-ac7 -nes;h nkbency 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 the sound as it pase7np k-:s -; 4bhc;bauqik( unses from air to rock?

  14.28: A waterproof speaker placed at the bottom of a s0 )f6qi;8qx hqfi.: -yxzrkve zlk(/kwimming pool emits a sound wave that travels toward the surface of the wateriq - x :)kqlyk/z; xf6h( 0ik.feqv8zr. 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 rectangul(pehmuglydf)y- *ao k4os 8 ;u vw21z4ar glass block with an angle of in y 1ud)zwaekmygu* 8o-4(4f; hplosv2 cidence 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 2/3tblz* mhz2 ;.sc 7fpouhyy a point P on a boundary as shown to the right. Which segment best represents the. b3t7m/p2 fcy2*zz o hluhs;y refracted ray?

  98.17: Which diagram best represents womd;kdr3wq8 ul .3 n 5;hz6crbhat happens to a ray of light entering air from water? Air is at the top io ubd;dlz 3r.knh;3qrm5 8w c6n all diagrams.

  94.11: The critical angle of a material is the angle of incidence for which qy9n)ez e.e d8the angle of refractiondey)8.9 q zene is:

  95.12: The principle underlying fbkssi 53qfq(:dv*oc p sj49:ciber optics is:

  98.36: The critical angle in a transpac p / nclds4-b9.s;eshrent 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 withmaxr69jo 1wwc 2d+:ne1 ip ah0 an index of refraction of n = 1.5 to material Y with an index of refr nxhd9a1 o+i1jw cwep6r 02am:action 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 adje- cu) ygyb l0)ceut 0z690w piece of glass by observing the critical angle of the light in each material. Gcd60lzwc -guuy eej 90tb0y) )lass 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 cle6mdebmn g;/ g8ar material. When the light makes an anglgg;m/enmd 8 6be of 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 anki)eta7( u;nsg8t8ksd (/ f e material 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 value of n iitd7n en)tuf gs(ke(a/ k 8;8ss:

  95.31: A beam of light passes from medium 1 to medium 2 to medium 3 as shownr r)qff7xyvpx:(t) f 7 in the accompanying figure. What is true abor(ft 7)y)ff rxq:vxp 7ut the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light pass6y ct e6qdgwg+6jayb1a hc;8y1n m2*t es from medium 1 to medium 2 to medium 3 as shown in the diagram. What may behe jwqd c68tabt+6g2y g6;1*yyc n1a m concluded about the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diwu)teiw + ek- dvo.28 30ylmzqagram 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 between tq )+wl3km2t.e zoy-u deiw 0v8he indices of refraction?

  09.34: The diagram below shows the path tak1vo4c ,jwnit) e0s4mc en by a monochromatic light ray travecec4 v0w)s 4jm ti1o,nling 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 travelina 2 *1htk f/o1ryk(zhsw;c f9cg 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 ;32g/9tqc, rflulu w(v(mgxmblock of glass auv(crugqm,fxm(9lg3tw;/ 2 l t 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 wavelength 600nm is transmitted from air into a piece ok3kbbb85x * waf glass. Which o* x 3wk5kb8bbane of the labeled arrows best indicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters the right-triangueyh0b)sg l,-alar 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 shows the p,b)ah y0 eg-slath of the light after it exits the glass?