11.24: Two wave pulses travel to thexrkz+otb 0-cua93 ynk h, afajq)2;o: right toward a rigid boundary as shown. After reflection of the triangular pulse, the pulses wilan9aqx t kza3- oc:0rf+y2hobk u,) ;jl 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 str9ikou8; n n *jq:btt:qikes the surface of a plastic block. Which pair of statements correctly describes the phase changes for the reflected wave and the nui8: jobtqn9*q t:;ktransmitted wave?

  12.02: A ray of light passes straight downward t zy te6aoc2a9k)snl3w8 0 y)kthrough the point labeled B in the diagram shown. The ray reaches a flat mirror placek aztatync80e6s92 ) )l3oy kwd 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 ligh (/kozkx vj,,s/zwdf*t is incident on

  05.18: A student hold a hand mirror to observe the back of her hev8d9h4ah +r.f e )r7 z/hwkhwrad 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 thhhz+awdreh4 r7h9) w /r. 8fvke back of her head how far behind the wall mirror?

  14.25: It is observe ,63n4r zgsgxezl r*s35 .uwvud that a light ray changes direction when it enters a new material. Which one of the following znuv3gxlg4 5z.6e ws u,*3rrschoices is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavelengujund b/. +ux2th 400 nm in a tranjb ndx+uuu/ 2.sparent material. What is the index of refraction of the material?

  98.04: As sound travels f4y4y l +simvn.9to l6rrom steel into air, both its speed and its:

  00.01: As a wave moves from one medium to(y r*iwm5y:lxmfcyxou n. 814 a second medium with a different index of refraction which of the following wave properties would NEVER changxmu:cr(noy51yi4m xw*f 8. lye?

  05.47: A sound wave generated from a tuning fork of single frequetzz ar(6ak1y 3xl (hrob2(;pzncy 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 wavelengt1(o6zlry3ax2pz;abkt(z ( hr h and frequency of the sound as it passes from air to rock?

  14.28: A waterproof speaker placed at the bottom of a swimming pool emits a sou-zf yxfdd7a03nd wave that travels toward the surface of the water. In the water, the sound wave has a frequencf- fxadzy0 73dy $f_{water}$, 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 whd ;g: uq.dy:e(fmc0u3ynfz8 hite light strikes a rectangular glass block with an angle 8f f ;.um:n u0z:e(dd3cqg yhyof 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 asmhxt-j ,2 c*:chzfi h5 shown to the right. Which segment best represents 5-:i thfczch hmxj*,2the refracted ray?

  98.17: Which diagram best represents what happ t3e (w;r:gaopwq5pa/ ens to a ray of light entering air from water? Air is at the top in all diagrams.aw:otw r3e5qp g(;/ap

  94.11: The critical angle of a material is the angle of incidence for whi9s0c at mzug v zie,)+cc -i/u1bo;a5nch the aco/nza-1gs 5+v)u;,icubt mz9 0 i ceangle of refraction is:

  95.12: The principle underlying fibexp7l*a jk0e 6er optics is:

  98.36: The critical angle rvwn q *8rd92zin 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 refraction oz/mfxk 3;i b.-g2nka df 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 sp-;f mnkgikz2 ax/bd .3eed of light in material X?

  03.15: A jeweler can distinguish between a diamond and v6j b,26cq15eyfjobo a piece of glass by observing the critical angle of the light in each material. Glajjfby6 2q o5 ebvc16o,ss 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.mhgav;c5-l +.dk6zy k1jzb - a When the light makes an angle of ia 5bzadc-mlhv- kj+y6k 1 .;zgncidence 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 ind4v/aji y2 lo:ejru slse: 1x),ex of refraction n. The laser beam emergjls axeo2: 4 r1i:,/lysjue)ves 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 passes from medvp33mj,x3+enxwygs:n t;0c .o m(fh zium 1 to medium 2 to medium 3 as shown in the accompanying figure:sv3;w c.0xn fj+z,hn3 3 xogpmt(mye. 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 to mediumy1,9p o xfreq+ 3 as shown in the diagram. What may be concluded about the three indexes of refracti9oqx pe1 f,yr+on, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray6y*dzy p/)et 3 h:bjhh 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 relatyt j3bz eyh h:/p)h6d*ion between the indices of refraction?

  09.34: The diagram below shows the pathvdls;kp.oj fc bxk84t +8edm+0q;ds 7 taken by a monochromatic light ray traveling + l0+pf ;7mc88 d4qekojk tsdvs.x ;bdthrough 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 glass d)s -kh6epn7 raxx.(m ($n_g$=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 block of gla7v322k lne*ush- lkiwss at an angle k2i ll7s 2w-k*neu 3vhof $45^{\circ}$. 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 q ,4s a wx-fujrk29sl-piece of glass. Which one of the labeled arrows best indicates thelu4 q2-fr,wajs -9xsk path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters the right-tri8+t7w;d 0r ixyt.db oybhd ;(iangular 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 x;dbd +iywh7i ;.o(dr8t0y bt the light after it exits the glass?