11.24: Two wave pulses travel to the right toward a rigid boundxa17* p7ii vvwy)f)mh :cn(wnary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best represents the superpo: xp7fhw(*wavnm)1vi)iy 7ncsition 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 plac4o9b-8rba)t 33+yb:sap q7bw pzoq cstic block. Which pair o w3cczro843tbbbqsy +9a)-o:bqp a7pf statements correctly describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward through the point z v ,)b-x7yrx lq))ikj labeled B in the diagram shown. kj7r-z,b l )x))ixyq vThe 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 omticd50 ao-s 1 vxc4,y-ftx 4rccurs whenever light is incident on

  05.18: A student hold a hand mirror to observe the back qxynx 9w9xhw0l4s+p1 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 head how far behind thh+x 0l91xywqp9sn x4w e wall mirror?

  14.25: It is observed that a light ray changes direction5/3 wporf*h, j g pzwny1ew,2l when it enters a new material. Which one of the following choices ish/l3w5z,,w pjfe*y ogpw12r n the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has yvow4j7b)5/h*bqyn ;o hw l(swavelength 400 nm in a transparent material. What is the index of refraction of th4hq/5)jysvwl bh7; o o*nwyb (e material?

  98.04: As sound travels from steel into air, both it0 da ;wntw hx9e 4*ssu2hpu p78e a4-yza,upk;s speed and its:

  00.01: As a wave moves from one medium fkvl/ tm 6uwrn(c+19bto a second medium with a different index of refraction whu 1nfmk(6wt vblr9+ /cich of the following wave properties would NEVER change?

  05.47: A sound wave generated from a tvqmlf; f8e 1fhw6-2n t lta-b* 0adt9kuning 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 about the wavelength and frequency of the sound as it passes 62mkv91;fd*fal qe tt-bn08hf wl-t afrom air to rock?

  14.28: A waterproof speaker placed at the bottom of a swimming pool emits ae u8 jseqtq1e +61b lxx*z2e+j sound wave that travels towarx eeq2s+ q+ utxl1ze86*eb j1jd 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 white light strikes a rectangular glass blocqyl2+2 ddf 1vrk with an angle ofvl2y+q d r2df1 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 towzkl(nxsl-:q.m/t. ynbna( +o ard a point P on a boundary as shown to the right. Which segment best represents t qnn-lz+/o.kbsamx:y. (tnl( he refracted ray?

  98.17: Which diagram best represents what happens to a ray of light ente5 w-ic + 0b/+gbz ps:m4vv ksz4x3qnvwring air frv3zcb5z sg /m+4pb0+wn4-qkv: vixswom water? Air is at the top in all diagrams.

  94.11: The critical angle of a material is the angle of incidence qub(vd8sc ): gsjy 7,xfor which the angle of ,yuq )7 vx sjd8(bsc:grefraction is:

  95.12: The principle undelgu 2nz2zhd3 /rlying fiber optics is:

  98.36: The critical angle in a transparent : qf) /x- hr8l60mbslbud4: k4mrdmld 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 wnd qg o (sh:cj7x+n8*nith an index of refraction of n = 1.5 to material Y with an index of refraction of n = 2. 7n jd +onn:*qscg8x(h0. If the speed of light in material Y is v, what is the speed of light in material X?

  03.15: A jeweler can dpk/5f :c5lfsc, ; n-zasa*avd1gz 2ugistinguish 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 angle of;kzafl2 vap s5c-*ac, :us z1dg/gf5n $41.1^{\circ}$ 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 lx ,m,lp- +*aibflss,gight makes an angle of incidence equal to slms ,l,b-g+ix*a f,p$30.0^{\circ}$, 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 l pjcu.pg) *.)g yq:/f pt /qrvhbl,q4easer is embedded in a material of index of refraction n. The laser beam : tv, pprqyq ./*fce )u4p.ljgqgb/h)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 passes from medium 1 to medium 2 tiuu3t, eg/g.(68 alx pxj6n0cry zsr0o medium 3 as shown in the accompann0,/sr(yu.i reuxc638 zg6 0lxgajtpying figure. What is true about the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes f vjie 0dcu-lhi)9l3r / (wngr+rom medium 1 to medium 2 to medium 3 as shown in the diagram. What(llehciv + j/3urgi)wr90-nd may be concluded about the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray takeu ux441(o) m/ 5p4lfy9 gvkwhi.qrkims passing through three transparent materials. The indices of refraction in materials 1, 2, and 3 are n1, n2, ahu 4xoq)v1fpwi/g l iym(5u4krkm9 .4nd n3, respectively. Which of the following best describes the relation between the indices of refraction?

  09.34: The diagram below shows th.i8jfpx5/ 6n qliezn/ )lk -xge path taken by a monochromatic light ray traveli.6zxq in xf)lkp8/- n /jie5glng 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 traveling in gaxl 5t,9rny-rv cbc7 8lass ($n_g$=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 rectanguvy6 zm l b(-(8qgzr+nclar block of glass at an angle ovqc ly bg8mr (z6z(-+nf $45^{\circ}$. 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 piece of g(8(lh1gi/zri0urrbuw l p 6i:lass. Which one of the labeled arupihr6:i wr(glb0u ( 1 rli/8zrows best indicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enj 0c .1r/wnn9vc jj(vhters the right-triangular glass as shown. The glass has an index of refraction of 2.00 and ijjcvncjvh0 9n1/ (.r wt is surrounded by air. Which one of the lettered rays shows the path of the light after it exits the glass?