11.24: Two wave pulses travelry eu)ponq,36 to the right toward a rigid boundary as shown. After reflection of the triangular pulse, the pulses will ino)n ,ur6qp3 yeterfere. 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 passe e zv.p)lx2ag-s through the air and strikes the surface of a plastic block. Which pair of statements correctly describv l.axpz-2 )eges the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes0+(njqxkdm emu3+f v, straight downward through the point labeled B in the diagram shown. The ray reaches a ev3j0fdun , mm(+kqx+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 insrdb24o,dm6v5 vv9 :hjv xt)scident on

  05.18: A student hold a hand mirror to observe the back of s 1hmw4tw*a23s uv/e jt6z q u4do4ru3her 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 will see t u13*dv6tt3h su4wa qwms4 reu/4jz2ohe back of her head how far behind the wall mirror?

  14.25: It is observed thatp)0 g;8n7cah qtl erb4 a light ray changes direction when it enters a new material. Which one oal tph rec7)q; 80bgn4f the following choices is the term best associated with this phenomenon?

  96.19: Light that hasd*4eku-y, a)dse j)e dy7 :vpz wavelength of 500 nm in air has wavelength 400 nm in a transparent material. What is the index of refraction o)s -* jdd:)pey,ze e dkuy7a4vf the material?

  98.04: As sound travels from steel inaz8 9 ajlapb 0s*3ny-wto air, both its speed and its:

  00.01: As a wave moves from one medium to a sa1dw r5fn.ro ag ypo3w)3 i1*tecond medium with a different index of refra ir*oo dw)1f pawt 5g33.nrya1ction which of the following wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of single frequency tdad j :.7qh,/vsipr1-nl /zbpravels from air (with speed of sound 340 m/s) into rock (with speed of sound 1500 m/s). Which statement is true about the wave-nl jip/q 7,vp 1drzs da/h:b.length and frequency of the sound as it passes from air to rock?

  14.28: A waterproof speaker placed at the bottom of a swimming pool emits a s98oljuiw (e sh)k(3 uaound wave that travels toward the surface of the water. In the waters8 )lh o(u9ek a3jwu(i, 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 rectiu pf4 zg.9sep6zzw(8 angular glass block with an angle ouz.8g4 wep 6(zzs9fip f 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 directed toward a point 36ztpxx+ 21w-vha: d7ifxtbe P on a boundary as shown to the right. Which segment best represents th62v 7xdbpwt+1ht :fz3eaxx -ie refracted ray?

  98.17: Which diagram best represents what hae2hr11ay2j)(t g hexeno(ug 9ppens to a ray of light entering air from water? Air is a )e2e9a(tjgo(1 2g hxrunhye1t the top in all diagrams.

  94.11: The critical angle of a material is the angleu t(+kvkpqdab0.z7c7n9 c l;x of incidence for which the angle of refraction is:u t7k(pb.xcqkl 70zdv cna;+9

  95.12: The principle undew(ho hg/+tps kl3 8,kwrlying fiber optics is:

  98.36: The critical angle in a transparent substar+2i-ui gs(e ynce 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 of n = 1.5 -y0ndv6yulf8 clg 1 yr:c, +ucto material Y with an index yycuu0y,: f-vcl6+r 1lgcdn 8 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 distinguish ltqr 6hmn+y/2nk2 yofx+g9b/ between a diamond and a piece of glass by observing the criti++ng2/ntmlh9yof xq/y rkb6 2cal 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 cleapy,4yb 8- giesr material. When the light makes an angle of incidpb8yg -sie4y,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 lasv y p, s76eyzl7c77nkm.hkn(yer is embedded in a 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 k7m 6s7n,e7nc(yl z.p7vkyyh of the laser and target. The value of n is:

  95.31: A beam of light passes from medde*avaukzue y4 yz.97s ,,a. uium 1 to medium 2 to medium 3 as shown in the accompanyin7k s e ,.aduu*4ay vz.a9uy,ezg figure. What is true about the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium4i,hi pns0,e c j-pew: 1 to medium 2 to medium 3 as shown in the diagram. What may be concluded about the three indexes of refraction, n1, n2 andcpejse,i0n,pi-h4w: n3?

  97.24: The accompanyingree:b pp.ct9i-e03 is o q0hz3 diagram shows the path that a light ray takes passing through three transparent materials. The ino3.eic iesbrh9 :tp p03zq-0e dices 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 shrc8 5ysxf h3nyme3x: ,ows the path taken by a monochromatic light ray traveling through three menr3 mxy5,8xys3 :fceh dia.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 ligh+quoe ;rbd n8q ejzm6z4 -x0a9t 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 i wr*apstr7aej58 v4o .s incident on the surface of a rectangular block of glasvtoewa j* .4857r psars at 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 wavem63r)s cflp8mlength 600nm is transmitted from air into a piece of glass. Which one of the labeled arrows best indicates the path of the light ray after it enters thc3 ps rmm6)fl8e glass?

  14.44: A ray of monochromatic light enters the right-triang93t lg18f dh b94b1y0* ptsll-wbgjgmular 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 path of the light after it exits the glass1j8 p93tb9l l4-0ysgh g1 lgbfwbm*td?