11.24: Two wave pulses travel to the right toward a :gabrr lem75o8 2 5l u)+rilkfrigid boundary as shown. After reflection 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 indivg8rkrf ro5b: )ai25l7m+u lel idual pulses coincide?

  08.30: A light beam passes through the3.dke-e (xoos-v1)s4gfmk.e zr z:im air and strikes the surface of a plastic block. Which pair of statements correctly describes the phase changes for the reflected wave and the transmitted wazf mo(.sed3kees )g.4kirvxo1z- :m- ve?

  12.02: A ray of light passesqieu 828v 3q 8t d*-gka9lrds- nr*pzfng: wb) straight downward through the point labeled B in the diagram shown. The ray rldq8 8 g*v rriqz-9ugebkt28d:*)npn-3aw fseaches 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 reflection occurs whenever hc;1si4 ,r i*kitbpo4light is incident on

  05.18: A student hold a hand mirror to observe th5im-f:xv,ah x e 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 mirrora- ,v:fm5 hxix 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 direction when it ent9zlb3.u gydb62hpeo +ers a new material. Which one of the following choices is the term .6lo+pub 3 gb9e2hzydbest associated with this phenomenon?

  96.19: Light that has mze)g6 ajos7 +33xnfhwavelength of 500 nm in air has wavelength 400 nm in a transparent 6f+gj) z s3xnaemo73hmaterial. What is the index of refraction of the material?

  98.04: As sound travels from steel into air, both its spe1z k dohe(,rfv-f c21 z1)ybdzed and its:

  00.01: As a wave moves from one medium to a second medium with a different in**011r ukar4ywtxyo tdex of refraction which of the following wave properties would NEVERr * *akyuw10yt4xt 1or change?

  05.47: A sound wave generated from a tuning fork of sin8 -s xa)d ggzrbxxk)fb9+ 89g-yod0 tvgle frequency travels from air (with speed of sound 340 m/s) into rock (wrxvxdad -g) 9f8gsg xtzo+b 9b8 )-ky0ith speed of sound 1500 m/s). Which statement 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+r *vhfjzr6+vx: +ullhe bottom of a swimming pool emits a sound wave that travels toward the surface of the water. In the watef r vzj+u+ *l:v+lr6xhr, 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 glass block with an h/ ytjajihy.xc7g8* / angle of incid 7/j/yjhcgxa.*8yi thence 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 a wo ;c6y1nwo)syn5l+v mqec ;;s shown to the right. Which segment best req;6no;c mwo5+csyel) v1; nw ypresents the refracted ray?

  98.17: Which diagram best represents what happens to a ra /fep rlo ylaep2+2uf*5v (8pmy of light entering air fromll2y 8mvp2oa ur f5pe(e+ f/*p water? Air is at the top in all diagrams.

  94.11: The critical angl/mmhepec/ n/ 1e of a material is the angle of incidence for which the angle of ref/mc 1hnmpee//raction is:

  95.12: The principle underlying fiber opt ci6(fprt;z;zxdg3d7er g( q1ics is:

  98.36: The critical angle in2rp htx+mk*(v 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 material X with an index of reh +ky e3dfgs;:fraction of n = 1.5 to material Y with an index of refraction of n = 2.0. If theef 3;g:s kdhy+ 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 a pgbij4oe4* ,dw5 x bjp-iece of glass by observing the critixw4,j*dgbp bieo 5 -4jcal 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 clear material. When the light makes an angtvlniob(1hob;gmar2p /v( 1p3di :9cle of incidence equalb3i1l iv b:v1 mro2(agn; p (cd9ph/ot 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 embedde ebqt19seu;x8 d in a material of index of refraction n. The laser beat9e81 xq eu;bsm 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 pgwv qs1*tk:-l-e.vd iasses from medium 1 to medium 2 to medium 3 as shown in the accompanying figure. What is true about the respective indices of refr sv1qd- v-wgtkel .*i:action (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to medium 3 as shogy/.wqor- y,zwrf. bg*;5hlewn in the diagram. What may be er owl/;,q-h.g f. r5bw*gyzy concluded about the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray takes pd. e hiw3pun m;f 7.s wn/ehw3j1ii8i-assing through three transparent materials. The indices of refraction in materials 1, 2, and 3 are n1, n2, and n3,i7-f n3h.wed.i eijw183snh/ ;uipwm respectively. Which of the following best describes the relation between the indices of refraction?

  09.34: The diagram below shows the path taken by a monochromatic lighd ig qc5*4*jwklh 9b8xt ray traveling8dxqk9 chg * ijwbl54* 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 travelinqqij53n c0h1hhmq+7)bf iqin; a 12ldg 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 iw8if/-w6xzxgyz 9 8 fbgfc1id+7kh-p s incident on the surface of a rectangular block of glass at an angl-w8 k6fg8 bh cx+/fpd gwf1zz- xiyi79e 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 wavelenlttb l uojf*d4 4f bj699 m*a)rgos,)qgth 600nm is transmitted from air into a piece of glass. Which one of the labeled f j)ts*l,)jt r4ql m4foo 9d u9b*bga6arrows best indicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters the right-tr(kr0rl4/ jr*k coj6vvml06h hiangular glass as shown. The glass has an index of refraction of 2.00 and it is surrounded by air. r /lhkomh0 rj60cl(j4kv*6rvWhich one of the lettered rays shows the path of the light after it exits the glass?