11.24: Two wave pulses travel to the rigqb :7vverrq5/c rs78 mht toward a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best rep7r /8mersv v:rq75qcb resents 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 surfao6pca*k( eanft2- f50. pw fxace of a plastic block. Which pair of stax 5.f -akpaa(cp2fet * ow60fntements 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 la23b)m uk y mt:i6eihu.beled B in the diagram shown. The ray reacheh u62 uebm3:iy ktmi).s 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 light is ins os8fz40guqdx 6: rs/cident on

  05.18: A student hold y*fs e mvt;y3:0yjarny aecn.)v:11q.z qg.c a hand mirror to observe 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 head how far behind ):nn. 3ym1s q tqe;0acy vv..yz*fg r e:ayc1jthe wall mirror?

  14.25: It is observed that a lightv)zgnl:;n k.t ray changes direction when it enters a new material. Which one of the following choicltk g.z:n)nv; es is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavelengk6k dg*b2 2c()pz 9h:urorz4pwqm *nxth 400 nm in a transparent materiark2pdkq w)*xc4gh pmz*r z6n( 9uob :2l. What is the index of refraction of the material?

  98.04: As sound travels from steeac*geg d i-mnxtx-qw( 0i;5a 9l into air, both its speed and its:

  00.01: As a wave moves from one medium to a seco,4nz0sp/ obpni63:o auoebt,nd medium with a different index0bip4 ap/3so,,b o:tn nz u6oe of refraction which of the following wave properties would NEVER change?

  05.47: A sound wave generated 07rl npl2a9egl7 nx,x from a tuning fork of single frequency travels from air (with speed of sound 340 m/s) into rock (with spee9 xre lx,g077nlpla n2d of sound 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 at the bottom d*ssob4f:5 zh of a swimming pool emits a sound wave that travels toward the surface of the water. In the water, the sound wave z4s 5:s ohd*fbhas 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 glass6ad+qy8tq8os wjyf4 09k0ara block with an angle 0 f0as6+q8q9ytaad 4jw8rk oyof 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 /( e+8k5tfs,i tpuqt sP on a boundary as shown to the right. Which segment best represents the refracted s5qt/eit fp t +k,us8(ray?

  98.17: Which diagramui e zcdl1mu 35wjngy2/p940u best represents what happens to a ray of light entering air from water? Air is at the 5e4 lzp/u 0jwm9udnu2cg i 1y3top in all diagrams.

  94.11: The critical angle of a material is the angle of incidencuh n -8pfi9*ht :2esyf;4japje for which the auihjf:pef 8sy;9tp*j4 an2h-ngle of refraction is:

  95.12: The principle underlyk0dj-du/ q/ ij, ,hjmti u91ening fiber optics is:

  98.36: The critical angle in a transparent substance surrounded b p8kblxcs8v 8*y 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 refracti 5wff,gscw0 xj uc0ac6-c,bf8on 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 licw s ub8cg-xa50,f wf,0ccf 6jght in material X?

  03.15: A jeweler can distinguish between a diamond and a piece of glass by fvjylvv4.3 d(m)g8up observing the critical a(mg3.l8j)ydv4 vpfuv ngle 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 clearvz9x+ pph*jj hbd7:) a material. When the light makes an angle of zpb7pvhhx+jj a:d)* 9incidence 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,em 6asv /x tzeb(mqo ./gd5+q 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.(o5z 6 ds.+qv ,bm/x/eqmatg e The value of n is:

  95.31: A beam of light passes from medium 1 tylj:oq vg8;;nu p-c./h 2ccc tj;rip 8o medium 2 to medium 3 as shown in the accompanying figure. What is true about the respective indices of refraction (n1, n2, aqyp 8;p :nc ;8gj-occtul.ijv /hrc2;nd n3)?

  00.14: A beam of light passes from medi4 *2a lz exl2ymy6(xufum 1 to medium 2 to medium 3 as shown in the diagram. What may be conc 4llfx2x2myz(*u6y e aluded about the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shoh-t9bo vf 1*z;0p99t *uu/uc w k kbzn)ao0alows 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, respectively. Which of the following best describes the relation between th)v9zozp- 9; cl0 hkaabotubt0 f1u */*ou9nkwe indices of refraction?

  09.34: The diagram below shows the path taken byw- 2lx3us. zye a monochromatic light ray traveli y- l32.xsweuzng 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 travelinofbx6( az-t(e v+tyo 3g 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 rectangula)fm2k i9 rp mkm5gk+. b2cc5zer block of glass at an angm.+eiz 2km5k cfr9) 2kpc 5mbgle 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 from air into a piece of ggc+ vob7gbmvqx b959u60 0zrflass. Which one of the labeled arrows best indicates the5gb00urgc 7zf ob969b vmxvq+ path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters th9;*+g- limkin5 nttib fb5t/ ic7-wr ue right-triangular glass as shown. The glk;+g5itubcni-/ rib7tl -m*w t9in5f ass 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 after it exits the glass?