11.24: Two wave pulses travel to the right toward a rigid boundary as se 2c,v7k m gn2b1jbzj0hown. After reflect2nj1k,j7b 2gemvcb 0 zion of the triangular pulse, the pulses will 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 thq1t :l.zbg va1rough the air and strikes the surface of a plastic block. Which pair of statements correctly describes the phase changes for the reflected wave and the transmittlg1vb .t q1za:ed wave?

  12.02: A ray of light passes straight downward through the pr-zv+-hnk9sji4kzb i* u 8-dioint labeled B in the diagram shown. The ray reaches a flatkin9*+uhz skj8 r-b-vizi4- d 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 i.qd + 0+iyorrxs incident on

  05.18: A student hold a hand mirror to observe the back of hergv7*dn62 uj3 pfw e1unevv1m1m3nd t 4 head while standing in front of and looking into a walmj 11d36nu2vn tg31vm4d pe*wunv7fe l 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 change ;h8-g/ -wpakd dq:avrs direction when it enters a new material. Which one of the following choices is the term best associated with this phr8kvq-gad /w: ;a-pd henomenon?

  96.19: Light that ha jt8w4exls,: u8wg2 /2m jr n(dwqyx-7h awc8ws wavelength of 500 nm in air has wavelength 400 nm in a transparent material. Wh w/cw jr7s 8g,en4ldw2xqhm wxa:w28 t(u-8yjat is the index of refraction of the material?

  98.04: As sound travels from steel4t) c-lfd u6 8)cn9dnu7 m3 ikrg.louk into air, both its speed and its:

  00.01: As a wave moves from one4 33rd twl;fs)*jsxkul6*djb3 0h myi medium to a second medium with a different index of refraction which of the followu) 63tj f l0ds4*rl3mb;dh3kw yxjis*ing wave properties would NEVER change?

  05.47: A sound wave generated frl h+g.trq5rmu 65aqp8 cin5a1om 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 statementi1r65lqu nm8a h5 qr+acp.5 gt is true about the wavelength and frequency of the sound as it passes from air to rock?

  14.28: A waterproof speaker placed at t v9k ct 09nqar,5w1cb2j uok1khe bottom of a swimming pool emits a sound wwt, 09a2vkqok5c cj 1bkn1r9u ave 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 whiten)sl :*3c*dmlqooa*g light strikes a rectangular glass block with an angle m)lso:lc* d*oqan*g3 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 a boundary fk31ro fts -jq)k0 l;vas shown to the right. Which segment best represents the)r-0f kf3ojlq skv t1; refracted ray?

  98.17: Which diagram best represents what happens to a ray of light:ep)i(p5cercti y xl6y* w1 y. entering air from water? Air is at the top in all diaw.c*ipc5 1yyxpertl i6(y :) egrams.

  94.11: The critical angle nj 5in* /kp/fvdak3b4of a material is the angle of incidence for which the angle of refraction iskv //p *dj453annfikb:

  95.12: The principle underlyu7 ba 2yr+ks:)ti3hos ing fiber optics is:

  98.36: The critical anglf 1fd71towp )ge in a transparent 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 materi wy3e++hn q9usal X with an index of refraction of n = 1.5 to material Y with an index of refraction of n = 2.0. Inw+39 e h+qusyf the speed of light in material Y is v, what is the speed of light in material X?

  03.15: A jeweler can distingu- a9e ao5m:g8 tpwg+nkish between a diamond and a piece of glass by observing the critical angle of the light in each material. Glass with9 +n geoatmaw8- :g5pk 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 material. When thx l4lm2ocy*ikw* q16ae light makes an angle of incid2yc kma*l *61lw ixo4qence 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 of index of refracti3ff(dw 4efsi+n 3og wxehkr yr73i231on n. The laser beam emerges from thenfwi frr1yde(3i+shw 23ekg7 3x43 of 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 th.ki7w*o*:3 stij9ys*t tlsto medium 2 to medium 3 as shown in the accos.:i t lh t9j*isyt t*k*73wsompanying figure. What is true about the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to bd3t vbf f*sltoz/r 2: x5*1hvmedium 2 to medium 3 as shown in the diagram. What may be concluded about the three1h*t5sb2 fv:votfl 3b* xdzr/ indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path thatjkmi if;6 nhf.;(-iafe11uv l a light ray takes passing through three transparent materiall f;k f.1h eau;6 nfm(vij-i1is. 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 showlhue, x:u05 l3 +xo/csg: iavqs the path taken by a monochromatic light ray traveling thro 5v,h:ale icu+q0 xxlou:3sg /ugh 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 traveling in glas+a p2-0ob1o7v6q/ elkeso d wbs ($n_g$=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 twgm .r pcqmd.f+ta3b5ax (93xhe surface of a rectangular block of glass axb9rwt .aq f3d .3+gc(mm x5apt 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 ,:ib.bza4t af into a piece of glass. Which one o,.biat zab :4ff 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-triangular glass as) hrd1.vc mc.arx u a4;xe;h-x0n-f gs 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 ligg0;.rxn-axhv x )-s4h1m cf urcea. ;dht after it exits the glass?