11.24: Two wave pulses travel to the right toward a rigid boundary zs)zxcda7 qyp3nqg(8t+ ofljni4*8 + as shown. After reflection 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 pul z)qon4ycjpl3(zi 7t+*a fx8g8sdq n+ses coincide?

  08.30: A light beam passes through the air and seldt7g.ht6s8 4ufr9ftrikes the surface of a plastic block. Which pair of statements correctly describes the phase changes for the reflecth lu7t dft8e4f9gsr6.ed wave and the transmitted wave?

  12.02: A ray of light passes straight downward througtn *w 97,ccq2 s4utkveh the point labeled B in the diagram shown. The9c2uk 4 , nc7wvstqet* 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 reflectionc fdce 3v-i4n0 occurs whenever light is incident on

  05.18: A student hold a hand mirror to observe the back of her head while stahy cc9)8 fdfw/5. urqqnding 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, sqc8/fur5 yd9w.)qchfhe will see the back of her head how far behind the wall mirror?

  14.25: It is observed that a light ray 8 colgqs0jmt y:;ys8l/oh5a6vd ) w2fchanges direction when it enters a new material. Which one of the followingjlhdos)o :sy/tw v2c mq ;808yg5fl6a choices is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavelength 400 nm in ae kc+. j exhkd*zflnwj8pr+q222 b43m transparent material. What is the index of refraction of the matdq2mx 2n 4epjk z.c8+b3 kfh2rel+*wj erial?

  98.04: As sound travels from steel into air, botho/; ne,av(w pj its speed and its:

  00.01: As a wave moves from one medium to a second my7-q +wrt ;dmredium with a different index of7mwyr trqd -;+ refraction which of the following wave properties would NEVER change?

  05.47: A sound wave generated from a tncqbp;r4;yeib,8f j*j. tb u1 -oz1y) gp )lbguning fork of single frequency travels from a8yegf-gpn;z*jopbu);c)1 j.q,by lt4 rb1ib ir (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 from air to rock?

  14.28: A waterproof speaker placed at the bottom of a swimmi9-exi.,fm/)ja odf e zng pool emits a sound wave that travels toward the surface of the water. In the water, the sound wave-z /.mdex,afi )oj9fe 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 gla:eq-7x+mtqug s gpy0.ss block with an ang x-smu0y+qtgpq.:eg7le of 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 as sho/:su2+ aiu(y/mb x nbwwn to the right. Which segment best represen/iwxy u sabmbu /n+(:2ts the refracted ray?

  98.17: Which diagram best represents what happens to ajib-hrt63y +f ray of light entering air from watb -hjr63t +yifer? Air is at the top in all diagrams.

  94.11: The critical angle of a material is the angle :dyl ytj p (:;(lfj4kj hul6*hof incidence for which the angle of refky6l hjd(uhj ;lp(t: j: 4*ylfraction is:

  95.12: The principle underlying fiber optixr0tz n n m:3ad4+vfq3cs is:

  98.36: The critical angle in a transparent yv 7qqf9pr2-w 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 materi, gzb14ehtl;zabgm5vhld2pa/-j72 tal 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 id2h/lvz;m2zbegjt , ala 47gh15p-bt n material Y is v, what is the speed of light in material X?

  03.15: A jeweler can distinguish between a diamo 1g fcyyrc0t+r sh(1u)nd 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 hasur hrcy f1g( )tcys01+ 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 /klt.aql)bcz h03uh,ij:ty 1 the light makes an angle tqj3t a.)hhcb 0u :y/llk z,i1of incidence 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 embeddyluh ywh5 e+0+k0fdq +r 7alz5ed in a material of index of refraction n. The laser beam emerges from the material and hits a target. See the accompanying figure for the positiwdzy7rh+ql5h0+ 5k0 fayl + ueon parameters of the laser and target. The value of n is:

  95.31: A beam of light passes from medium 1 to medium 2 to medium 3 as shzlh d,+pa +hr7own in the accompanying figure. Wp zh+harl+ 7d,hat 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 medium 3 1gy48notorqo2 rgx:,7z a,voas shown in the diagram. What may be concluded about the three indexesxg1,y4t2z rvooqa,:r8 og 7no of refraction, n1, n2 and n3?

  97.24: The accompanying qa.c b/f3c .yr1.anpydiagram 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, respectively. W /p..r1.fbc3aq naycyhich of the following best describes the relation between the indices of refraction?

  09.34: The diagram below shows the path taken by a monochromatic lighfgsvcgva aq30. o:tut p(x46.wl4jr7 t ray traveling through thftwqaso ta0 v (ujxrg lgpc.4:v4.3 67ree 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 lig1d-ced 0/rztqu yrj1 h7u0x5cht traveling 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 incidentvjqx)rhk7 9 iym7)/q zf4dr.i on the surface of a rectangular block of glass at an angf.r9izhqyx )v47d7 jr/q )kmile 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 trage0am a:)b;f g/unt c.nsmitted from air into a piece of glass. Which one of the labeled arrows best indicates the path of the light ray0cn :)e. g/afa ugtbm; after it enters the glass?

  14.44: A ray of mono/ ivat7x09 1*hfmogcz:ts.1hlfg9 dcchromatic light enters the right-triangular glass as shown. The glass has an index of refraction of 2.00 and it is surroun9gfch.cs h dx7m*f ltavo19gz/i01 t :ded by air. Which one of the lettered rays shows the path of the light after it exits the glass?