11.24: Two wave pulses travelx/jet t.- b l7o24 wegf,(yoxrdzcb00 to the right toward a rigid boundary as shown. After reflection - tbo0 yzx(o ,0d4we b7efr clj2xg/.t 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 through the air and strikes the surface of a plasm0( ly y+w44p a 1yu.i:yllkn c7tgd)vtic block. Which pair of statements correctly describes the phase changes for the reflected wave and the tra:ucaly4 g4 yi lmvl .k p(1y+)tn0d7ywnsmitted wave?

  12.02: A ray of light passes straight downward through thhdm(+k tw1:unuka8dkybg 9nmr9xm02w)1:gh e point labeled B in the diagram shown. The ray reaches a fla01t m+wg gkdrhknnkbah wu(29mm1:x 8u:d9) yt 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 reflip/cs5)3 - mnorg bzp3ection occurs whenever light is incident on

  05.18: A student hold a hand mirror to observe the back of her head while stapj9f 0 fpe ux*d*v5vl.0kwrl4 nding in front of and looking into a wall mirror. If she is standing 4 ft in front 9.wupvp*0lf40j fvxlkd e*5 rof 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 changes direction when z9ume7jao qddvygnkz - 84 z9 p+:sc,0it enters a new material. Which one of the following ch sa,zj8+4 -nkm9qp0y9zovddceu:zg7oices is the term best associated with this phenomenon?

  96.19: Light that hasg4jqbl0 up nhgd j5od7acs).8f (c 76s wavelength of 500 nm in air has wavelength 400 nm in a transparent material. What is thej4)fqo(j nacs08 chbgp5s d d677lgu. index of refraction of the material?

  98.04: As sound travzf2( gn;*6jc ug*upxyels from steel into air, both its speed and its:

  00.01: As a wave moves from ,yz(gqjwud*3one medium to a second medium with a different index of refraction which of the following wave properties would N3 u(yzgd*wj,qEVER change?

  05.47: A sound wave generated from a tuning fork of single frequency travels fro fb)p4bubhog/ )6tj3 gm air (with speed of sound 340 m/s) into rock (with speed of sub4p h bojgtg)b/f)3 6ound 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 a xe wdnedm)/h w4i(f,7r; 1ad/sfd4 bwt the bottom of a swimming pool emits a sound wave that travels toward the surface of the water. In the water, the sound wave has a freq) i,wnx1 h4f/;d ww/(drdmsdefa4e7 buency $f_{water}$, 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 li)lw-bv*a:pt-hrhwyl.3a b1 b ght strikes a rectangular glass block with an angle of incidenc1b.b-p*l yw:l abh -hwva)rt3e 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 a23v .c+azh vmh boundary as shown to the right. W a.+hv3zch v2mhich segment best represents the refracted ray?

  98.17: Which diagram best represents what happens to a ray 12dzt,f xvp4s-atp+ .zrnn ;p of light entering air from water? Air is at the tzvt1a;- pdp nxsnr z+ .p2t,f4op in all diagrams.

  94.11: The critical angle of a material isyq4nh7ctj l 0ixv3+:5pi9f xs the angle of incidence for which the angle of refraction is0 4nc3i7thl5f ijxp s :9yqx+v:

  95.12: The principle underlying fiber optics isf)b3ai+g 4ta m:

  98.36: The critical angle in a tran.zo; manmd5 j8sparent 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 of n = 1.5f5 rw(3tcv6xh m.+rc w to material Y with an index of refraction of n = 2.0. If the c(t3v.6 5wx+hwfcrrm 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 diaxan0-l gc (cc2km w* hso1r*d(mond and a piece of glass by observing the critical angle of the light in each material. Glass with an index okc(0nwr ogl dxs-c21(hm**a cf 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 clewx92iu+n*y s mar material. When the light makes an angle of incidence equy9xs m nwi2*+ual 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 atlp,ei. * rs2material of index of refraction n. The laser beam emerges from the material and hits a target. See the accompanying figure for the position parameters of the laser and target. The value of lti.s2r, p*ae n is:

  95.31: A beam of light passes from medium 1 to medium 2 to medi( b-3+bju rfzvvmcv/u,hd, 4sum 3 as shown in the accompanying figure. What is true about the respective indices of refraction (u,bjum cfb- s vv/v(z+4d hr3,n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2m43z*+5di6 u fi3rs sjig3 xyk to medium 3 as shown in the diagram. What may be co y3jm+dzi53u6 g 3ks4xrifis*ncluded about the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diaga a1)) yyy;bliram shows the path that a light ray takes passing through three transparent materials. The indices of refraction in materials 1, 2, and 3 are n1, n2, and n3, respecyl a; )i1)byyatively. Which of the following best describes the relation between the indices of refraction?

  09.34: The diagram below sh8 m9i8cga:t 6il1eb pmv-ouu4ows the path taken by a monochromatic light ray traveling througa4 ic-e1 u 9lbmv68:oputgmi8h 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 tr2 y)v92ege)nsez z mn-aveling 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 incident on the surface of a recta(4- tcvqw+tikm, vm .hngular block of glass at an angle ov-4 it (cw.m +,vhqtkmf $45^{\circ}$. 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 1u-l8x 3tb:g eol ;yyf.m8bxw into a piece of glass. Which one of the labeled arrows best indicates the path myox y8.83lwb g- b;1 xutle:fof the light ray after it enters the glass?

  14.44: A ray of monochromaw +ytdoy/w tb-9 n w:+1p4icdf,iuj6n tic 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 the lettered rays shows the path of the light a no/-iw, 4+1yp6+du nb9wtyfcijdw:tfter it exits the glass?