11.24: Two wave puls7miod0 xw ephq6-d,e6 es travel to the right toward a rigid boundary as shown. After reflection of the triangular i6e-hw,d d7mxo0 eqp6pulse, 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 through the air and strikes the surface of a plastic xak9oy0i yt-e jraf m,/p(2x ms.f:1 kblock. Which pair of statements correctly describes the phase changes for the reflected wave an. k2fioyyxe(/k ja, -mmtsrf01x9a:pd the transmitted wave?

  12.02: A ray of light passes strarebxf-e6 k*o 8. hq*(n9jtn hv8)i1qnm eq7pvight downward through the point labeled B in the diagram sh1*e)7p k(ei t6e9 n*nhv r8h 8qboqx-mvn q.jfown. 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 reflection occurs whenever lighvs2) 7z.x gf mtdef57it is incident on

  05.18: A student hold a hand mirror to ob 9scphn;tgaa; +3u *niserve 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 see the back of her head9i cgaun +n3*sap;;t h how far behind the wall mirror?

  14.25: It is observed that a light ray changes jx qgq7lg))g07j0soqt8s7 ak direction when it enters a new material. Which one of the following chgk0) qsaxl7 7jgt )7g0osqq8 joices is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm ;xkr 3vlsio 42in air has wavelength 400 nm in a transv 4i3xork 2ls;parent material. What is the index of refraction of the material?

  98.04: As sound travels from steel into air,doz qe 3a3bu/9zp; i *53pgrih both its speed and its:

  00.01: As a wave moves from one medium to a second mediumj8.he yixaj) -leuiv2rf/ u 1) with a different index of refrac8/ri.vu u-iel h f2e ayj1j)x)tion which of the following wave properties would NEVER change?

  05.47: A sound wave generated from a tuni eyc;l,v d:5n21wr dmdng fork 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 aboutdv wed;:52n ,1 dcmyrl the wavelength and frequency of the sound as it passes from air to rock?

  14.28: A waterproof speaker placed at the bottom 0gea,xxifdl0 61 zg2uof a swimming pool emits a sound wave that ,fdg0 6lux a20zix1g etravels 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 white8u03lq j3 cgro, he(v bxjpv0. light strikes a rectangular glass block with an angle of incidence of 38vv, ( o gjbqx0c j3ur0ehp.l $0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of light is directed towa-8kb prhy( i db070)irlcnl4srd a point P on a boundary as shown to the r0cs -8dk( 7ni lbhlr0)b4 rpyiight. Which segment best represents the refracted ray?

  98.17: Which diagram best repreer c7egnjg kj;;ag3) 0sents what happens to a ray of light entering air from water? Air is at a3 ;ge)gj 0crke;j g7nthe top in all diagrams.

  94.11: The critical angle of a materialnv7x 1yekmu.;w a6 f:e is the angle of incidence for which the angle of refraction ism 7e n:akvx;uy wfe.61:

  95.12: The principle underlying fib nvzh/kyb0+wk b+89ixp4qm6 d er optics is:

  98.36: The critical angle in a transp :bwb rnasl,p d-z -wfd20m5*yarent 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 fw)jlyk(vcy9o;l -nysw ly)qn -:e 3 2qrom material X with an index 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 light in material Xe ;-l)ywqsykwjol3y lq) vcy n(- 9n:2?

  03.15: A jeweler can distinguish between a diamond and a piece of glass by ob )iudu3e*nu 40kvcd fn)p+ 7dgserving the3u feu*v)digpdd cunk0)4n7+ critical 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 lightyoaa ekgb7r ky/. +2,o makes an angle of incidence equalyb 2/.a,grk +oyo 7eak 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 refractionbbtegvvj1l n;q32- : q n. The laser beam emerges from the material and hits a target. See the accompanying figure for the position paramet1q q-: bt3bjl2;gnvev ers of the laser and target. The value of n is:

  95.31: A beam of lighth-xm8- c8t mw fen; yip*jo./w passes from medium 1 to medium 2 to medium 3 as shown in the acco-mcf.np8 h/xmet-yw* i8;o w jmpanying 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 medium 2 -8n tfh4mysf4to medium 3 as shown in the diagram. What may be concluded about the thremf-h4 4y n8tfse indexes of refraction, n1, n2 and n3?

  97.24: The accompanyin; 1-bvf7qqq6 7rw i,xkxg8qm zg diagram shows the path that a light ray takes passing through three transparent materials. The indices of refraction in materials 1, 2, and 3 a 7x,-7mbq xrqwfqk;qgi8 v6z 1re 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 monochromatmzkov sq:q47:ic light ray traveling thromqzo 7vq4::sk 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 gla(3y p:fbgky3-k z.xmo6x9 e8d0sotg sss ($n_g$=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 the surface of a rectangular bl()8fsbbr)rjb u:slq 1ock of glass atrlj:fbb1()qusb8sr ) 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 transmiz8ncy6h;ad/+to e0 y ttted from air into a piece of glass. Which one of the labeled arrows best indicates the path of the light ray after it e8+t/0;e6dzn y cyatoh nters the glass?

  14.44: A ray of monochromatic lighp 5*; 2vptsvkfe7a;( ha.e fevt enters the right-triangular glass as shown. The glass has an index of refrp(v p;a. va*2vhs;teke5fef7action 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 glass?