11.24: Two wave pulses traxgf 1b /uxmltxoy1o;a t9:f *)vel to the right toward a rigid boundary as shown. After reflection of the triangular pul t1a l):tfo xgfb1m/xy *;o9xuse, 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 s ywm: a27;qqentrikes the surface of a plastic block. Which pair of statements correctly describes the ph;a qn: e2myq7wase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward through thet 1s-u jz*:pmnrm3w (z point labeled B in the diagram shown. The ray reaches a flat mirror twn1jsm uz:-(* rm3pzplaced 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 whs9z3t5+47o3dio5h b gc d ppspenever light is incident on

  05.18: A student hold a hand mirror to observe the back of (x*a+kab;:a inpu 64za3cbg qy7scc3v2:mtq 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 hold *z a c 7q6g(3 4+:2mbnx pcsyaa:3bkuqi;tacvs 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 ito)nwrm7u6on9j * g +lzi9(g n:t6l-a/pe wkhm enters a new material. Wtl*- 6 o/j9 6)m:( nwnozhpn7g+ amu g9weirlkhich one of the following choices is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavelength 400 w( h p h5s+s+svg fxe*dtfn:9,nm in a transparent material. What is ps9f gs,stn 5fhhe*dx+v+:w(the index of refraction of the material?

  98.04: As sound travels from steel into air, bot 0rp5 +*nabikbh its speed and its:

  00.01: As a wave moves from one medium to a second medium wifzv.c lm6sb)mzk.fc.wojr 9h w4 8n 3.th a different index of refraction which oszz 6lo)9rc. 3kmw.nmffb.c.jv4 w8h f the following wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of single frequency travei48,vckyf 4;- qj pvtbls from air (with speed of sound 340 m/s) into rock (with speed of sound 1500 m/s). Wjkbi, 8vpt4-v;c4fy qhich statement is true about the wavelength and frequency of the sound as it passes from air to rock?

  14.28: A waterproof speaker placedafwx( hi1m, i1 at 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 1iix(fhmaw1, 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 ho*pz 9ss19whblock with an angzs1hhow*s9p9 le 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 pointzmo2uo, dj726 rq5sxi P on a boundary as shown to the right.276oqj x 2mriodszu5, Which segment best represents the refracted ray?

  98.17: Which diagram best represents what hap7v;s zt*h fc3jpens to a ray of light entering air from water? Air is vfsj3 t7zc*; hat the top in all diagrams.

  94.11: The critical angle ofk6j3i iejzsv)5 ,ofkp 5h: 4jsf 3ae1u a material is the angle of incidence for which the angle of refraction is:3 zjsv3eo 5juispj fk5a6h1)f ik4e: ,

  95.12: The principle underlying fiber optics if8urt4 t a1ybvy v;18es:

  98.36: The critical angle in a transparent substance surroundefcf0q2rgv5 6 i:q hns7d 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 materia vzi9xbv9s1,ru x+-bbg.yq3el 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 in material Y is v, what is the speed of light in mate i 99xxb+v,bb3 zr-eg vu1qys.rial X?

  03.15: A jeweler can distinguish between a diamond ancm0* lcw.fps7s6zq,1d: l4rp+t lx9z k tnw1pd 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 wl z * x6.+ttfrl0:nkczs1,ml9p4cs qp71pdw 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 cv(d 3glg1vq 6tlear material. When the light makes an angle of incidence equadvq3 1(glv g6tl 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 mater 6 k(q/bi6hqx(ycuoe( ial of index of refraction n. The laser beam emerges from the material an 6(/ (6 oxqiyhbkueq(cd 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 ligdm i-ww* daeeme+948m-tx g(dzi :gt7ht passes from medium 1 to medium 2 to medium 3 as shown in the accompanying figudd 8gwe9-mim gt7adxe4(e* w m+-zi:tre. 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 mediugi gti9*;v *aym 3 as shown in the diagram. What may be concluded about the three indexes of refraction, n1, n2 and n3?gi*v;9*y i atg

  97.24: The accompanying diagram shows the path t *u9c5mlxo9 eehat a light ray takes passing through three transparent materials. The indices ol5 9u *ceeom9xf refraction in materials 1, 2, and 3 are n1, n2, and n3, respectively. Which of the following best describes the relation between the indices of refraction?

  09.34: The diagram below shows the path taken by a monochromatic light ray 4iwv+5uhq9-2 g3 h61 z)rddp)dcuy ajswxfw, traveling through three medi )x r6y-dw2+i af udcwhz,gj1svd)q3 w45p9uha.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 glann)p- o;-c-b ,vzlq qnss ($n_g$=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 h6 :g6jh,hl*h qfz5ahof glass at fhh6aj*6 z:g lh5h ,hqan angle 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 6 3k9n;p 9yy/, siyzm8xn j2nfz00nm is transmitted from air into a piece of glass. Which one of thepyiy293znm; k,9nj/f ys8 nzx labeled arrows best indicates the path of the light ray after it enters the glass?

  14.44: A ray of monoch-er;sod;qwfry9 g )jw5: u d4dromatic light enters the right-triangular glass as shown. The glass has an index of refraction of 2.00 and it is surrounded byrdrdo9g-: qww5 ud;y4 s)ejf; air. Which one of the lettered rays shows the path of the light after it exits the glass?