11.24: Two wave pulses travel to the-*dv3l li tlx/ right toward a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfe/tl3ilv*x-l d re. 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 the air and strikes the s1r umn)0s5gzsurface of a plastic block. Which 01mn5)rs zsugpair of statements correctly describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward through the point labpb+ l/bw v9ulr)ms(k*eled B in the diagram showns+k l v/rw )blmp9bu*(. 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 reflect*0qklyoiov t0- wc6v 2ion occurs whenever light is incident on

  05.18: A student hold 5aqxp5dg:n*u) hl ks9a hand mirror to observe 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 mirror 1 ft behind her head, she will h9qs)gd xlpaku5*5 :nsee the back of her head how far behind the wall mirror?

  14.25: It is observed that a light rayv..tje;6 ys8vrk0 rkmv*r:aj changes direction when it enters a new material. Which one of the;a rt .m6j0v.jks:8rk*rvvy e following choices is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavelength 4b1hcy9y,md ,u00 nm in a transparent material. What is the index of refraction of thcb,y1,yd m u9he material?

  98.04: As sound travels from steel into air, ucq j2b:,qslc2s 1c b*pe1 ml7both its speed and its:

  00.01: As a wave moves from one medium to a xxi4pxv)l c6(second medium with a different index of refraction which of the following x6x)l4(cxpv i wave properties would NEVER change?

  05.47: A sound wave generated from a tuning for z7z3s(a0ne9dv wv 8yak 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 the sound as it pass0sv7(zdava zw y89e3 nes from air to rock?

  14.28: A waterproof speaker placed at9n s4 bfrbj /3z cpvqcq) pb3uf)8*r;l the bottom of a swimming pool emits a sound nv 3/jfz3bc9 q8lq*rubp4 ))b;cs frpwave that 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 a rectangular glassslj)t pd7k9 8n/g,z krq7sxyt+5qmp ( block with an anglek g/s9sy7pq)l xp7z qt8 j+nt,d mk(5r 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 directed toward a point P on ;1qde :tasx7i a boundary as shown to the right. Which 1;i7d etxqs:asegment best represents the refracted ray?

  98.17: Which diagram best represents what happens to a ray of light entering azv +x1k7 g-knp2 gd0jbir from water? Air is at the top in all d0xzd +g gpkkn b7v1-j2iagrams.

  94.11: The critical angle of a material is the a1 7-ne:kfaau ingle of incidence for which the an1-aueif 7 k:nagle of refraction is:

  95.12: The principle underlying lc xq +6cb;cb;66afqifiber optics is:

  98.36: The critical angle in a transparent substance j05/be60qa 5jftigh 1sm p/: hh 0dmpqsurrounded 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 indezxs, q4 zo6o2vx of refraction of n = 1.5 to material Y with an index of refraction of n = 2.0. If the speed of light in material Y is v, what is the speed oxqz vs,62 zoo4f light in material X?

  03.15: A jeweler can distinguish between a diamond and a piece of glass bywsfc+m.9njn7j2 n(zy observing the critical angle of the light in each material. Glass with an index of refraction c7fwjnzs9n (yn+j2 m. 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 mazlcd/ ne .2:f hj; yajk(-tk4bterial. When the light makes an angle of inci/t;ekz-2k. 4d ylcj n:ahbj(f dence 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 embeddepzo a:7q )w m1tz rx9je)d6zy7d in a material of index of refraction n. The laser beam emerges from thqywxdrza)tz 1 :97)mj7po6ez e 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 ts+ pc48a-91+gosmu c8lwci bk o medium 2 to medium 3 as shown in the accompanying figure. What is true about the respective ink-cl+a c s1 go+8uibsm9 pc84wdices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to medium 3 as shown cs +(g/u/qan ca s1,yr) meds:in the diagram. What may be concluded about the tra+a,:eycn1d( / sg/ sqs muc)hree indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the pathp-q9i7tx i+tycqg 8(6p : rtzw 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 bet z:tc9 ti7tp+y wi prq8x6q(-gween the indices of refraction?

  09.34: The diagram below shows the path taken by a mononf(ny.l n6kh. chromatic light ray traveling through three media.Th.6nh(lnf n. kye 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 -;19 y731rqfi/6k rp vftui gjxi7bcyin 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 t(r702 x6rkg2ovn zqs.l5b mamhe surface of a rectangular block of glass ats5a kx 2(m7o0b mvqg.6rln2rz 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 of gla:4g ph--9syckrujjv 7 ss. Which one of the labeled arrows best c 4j-yh:u vjk7p rg9-sindicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light i. t8m:qmw*-y nwnd7p enters 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 shows the path of the light a-yd mn.tqm 7 *w8:wpnifter it exits the glass?