11.24: Two wave pulses travel to the right toward a rigid boundary as sh*lb+4/- ougj iswlq 9tce mj,dt -++grown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best represents the superposition of the9g,lg islb/- j4m +cw+t-rjqo ut *ed+ pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes through the air and strikes the surface of a jco8o7fwz-v96(i3 + ej)ir9nxsqcntplastic block. Which pair of statementsf3-x9i7)w8 j sc(in zv jrq+ etooc69n correctly describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward through thl;v8:m ;wbe05q9p( httyr rwte point labeled B in the diagram shown. The ray reaches a flat m(m0rb t;:9wlq ryeptv58wh;tirror 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 whenev2n4id-9r(g mgjpw7b rt n-h1oer light is incident on

  05.18: A student hold a hand mirror to observe the back o kipwuvamggl45dj)y*w r103: acz99j f 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 see the bvc0 a )kwygw4p3agr mjud*j1:z 95l9iack of her head how far behind the wall mirror?

  14.25: It is observed that a light ray chang zr7yip) e9q:hes direction when it enters a new material. Which one of the following choices is the term best associated with this pheepziq: y79rh) nomenon?

  96.19: Light that has wavelength of 500 nm in air h m9aaiv) c7a;)wdlo+ xv4od 0mas wavelength 400 nm in a transparent material. What is the index of refraciocx);0 )d9d a aomv4vmlaw+ 7tion of the material?

  98.04: As sound travels from steel into air, both its fa6c4.gmb9t8jixev dj/atx 64 ); bgf speed and its:

  00.01: As a wave moves from one medium to1.jeh*jfj l* g+n1rft a second medium with a different index of refraction which of the fo**+h njl fgj 1ejf1r.tllowing wave properties would NEVER change?

  05.47: A sound wave generated from a tuning faml90cu mc 3+rork 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 tr au 0crm3cl+m9ue about the wavelength and frequency of the sound as it passes from air to rock?

  14.28: A waterproof speaker placed at the bottoz2+go m5dkohy8m.rh- m of a swimming pool emits a sound wave that travels toward the surface of the water. In the water, the sound wave has a frequenmdr2og+ho-k y.85h mzcy $f_{water}$, 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 withm/wkeen( yk2pyw41(v wc8 ,3xww6 ld i an angle2 iwxkwdwl6ce 8k 1(w/43(vyyw pnme, 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 uzluktr5+s.f-7 *s7zbdb4 cetoward a point P on a boundary as shown to the right. Which segment best represents the re.zubt4u7 ssek-7 zfcb+r 5dl *fracted ray?

  98.17: Which diagram best represents what happeltqc5054pat v ns to a ray of light entering air from water? Air is at the top in all diagrq0ct a v45l5ptams.

  94.11: The critical angle of a material is thei twmlo bp xl)..+du4+ angle of incidence for which the angle oftul.dmlpiwx + .o4 )b+ refraction is:

  95.12: The principle uis :zhg-2. nj*xrido8yr) m (wnderlying fiber optics is:

  98.36: The critical -suk(q;bw7h mu-i1pcangle 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 material X with an inde9y/ 8l2yadvaqbi1c d2)zwiuk1 6s 4 ixx 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 of lightvw )dlx1c1yq iz/4aua2bs 6k9y2di8i in material X?

  03.15: A jeweler can puk(b .znhv-)distinguish between a diamond and a piece of glass by observing the critical angle of the light in each material. Glass with an index of refraction of 1.52 has a critical ang zbkph)n- .vu(le 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 anfsfsb0 pci +s4,r,vy 1 angle of incidence 0 ,p,bisv4f1 +rcss fyequal 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 lase9 pgsfwd1 9a9ruk1iq *r 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 9 s1i1duqakpw *r9gf 9position parameters of the laser and target. The value of n is:

  95.31: A beam of light pas*ur4d oxm55i tdne)h0ses from medium 1 to medium 2 to medium 3 as shown in the accompanying figure. What is true about the respective indices of 5dt0o)* xniemr 4 5duhrefraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to mediu5. 9nmmnve .iw(l1vl nm 3 as shown in the diagram. What may be concluded about the three indexes of refraction, n1, n25 (nvmemnl9l .n1w.vi and n3?

  97.24: The accompanying diagram sh -xiwm59mw/0 qwtq j*eows the path that a light ray takes passing through three transparent materials. The indt5w qqemw *wm0/i9-xjices 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 shows the path taken by a monochromatic lighiumgsn5gi/ :/ t ray traveling through three media.The symboi:/ugsni g /5mls $v_1$,$\lambda_1$ , 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 traveling774) 4ps);a wktuiwq3wk0dd iu eg.bv 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 o;a,n5h mi gg2incident on the surface of a rectangular block of glass a;go2 amhn5,igt 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 ;/gvwh,/afwt(w gqa43 y asf*from air into a piece of glass. Which one of the labeled arrows best indicates the path of the light ray after it enters the glass?g; /tysh3/ a*a (4v fwgfaqww,

  14.44: A ray of monochro, ei/vnz e8,wdmatic light 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 ene iz ,/8wv,dthe lettered rays shows the path of the light after it exits the glass?