11.24: Two wave pulses travel to the right toward a rigid bouf+j miu9 l f))7 b8ri/ln8lnoundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best represents the superposition of t9iu/8ul7mrli on)n+f 8j bf)l he pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes oqnzf+yj-)8mk5yi2b through the air and strikes the surface of a plastic block. Which pair of statements correctly describes the phase changes for the reflected wave and thy5zfq8+ym) i2- koj nbe transmitted wave?

  12.02: A ray of light p34e qxni*gd;gasses straight downward through the point labeled B in the diagram shown. The ray reaches a flat mirror placed at an n3xg4 qe;d*ig 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 refle/zl;p0e vj4 k lay2*djction occurs whenever light is incident on

  05.18: A student hold a hand mirror to observe the back of her h7gf0x n 4s2;x bzcxyy ri -haf8v9p+,qead while standing inrqfxv4a-ncs + bz0y 7ypih9;gf82, xx 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 the wall mirror?

  14.25: It is observed that a light ray changes direction wh 7.b;nkatn2co i;t7 eqen it enters a new material. Which one of the following choices is the term best associated with this phenomenob ni 72ko; eacqt.;7ntn?

  96.19: Light that has wavelength of 50087 cz 8l* 3lhn:qxnihgkr 7:lu;hlun/ nm in air has wavelength 400 nm in a transparent materinu 8: lk3 7c/h7lxunilr8*qh nlh:;gzal. What is the index of refraction of the material?

  98.04: As sound travels from.lm l xycd fj,kl8b 50o5;.gsh steel into air, both its speed and its:

  00.01: As a wave moves from one medium to a second medium with ak/ po1 m1dsrkgk6s,nw sbxnv 0k4)n;( different index of refractnrbv 1;sk0n mp4)dos/ n(skx6,k wg 1kion which of the following wave properties would NEVER change?

  05.47: A sound wave generate:4ghqcaub gh;il* 5pl 5x, wk/d from a tuning fork of single frequency travels from air (with speed of sound 340 m/s) into rock (5u4giwl:k 5l/ qghh ;cp,bx a*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 speakew/g3ugdum u b9g0gn*t)z:e;zr placed at the bottom of a swimming pool emits a sound wave that travels toward the surface of the water. In the water, the sound wavmzgg:uu/gz;b eut 93d0 *g )wne 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 ,6n9uk ck vs+bxptb,3u 3x ea5rectangular glass block with an angle of incidence of,vcpke6 n5x 9+tbsxuu,a33bk $0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of light5k3u*vi9tp3n-r o fn t is directed toward a point P on a boundary as shown to the right. Which segment best represents nt5n tu-kor3v *i93pfthe refracted ray?

  98.17: Which diagram best represents whaao g; 2t we)oiu wzllxp)m(:-e4w j.2ot happens to a ray of light entering air from water? Air is at the t)zj4(-iwo gt .:;eolmw aw)o2xl e2p uop in all diagrams.

  94.11: The critical angle of a material is the angle of inciwpb2k9xe p--t- uz zqgsw. 2e-dence for which the angle of re2w-k zpe.xezspwbu2--9-tqg fraction is:

  95.12: The principle utt(q2 jw( ,uka56rqy,fjtq c/: ee ojb,ra s:;nderlying fiber optics is:

  98.36: The critical angle in a transparent substance surroundeddz:w2a9zhz 3r*ql5za 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 ndjsgx)p*3v- t = 1.5 to material Y with an index of refrd*x tpjs- 3vg)action of n = 2.0. If the speed of light in material Y is v, what is the speed of light in material X?

  03.15: A jeweler can distinguish jq j3aqi3jd6 1between a diamond and a piece of glass by observing the critical angle of the light in each material. Glass with an index odj j q3q16i3jaf 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 clear ma ,g(covjd ..iuterial. When the light makes an angle of incidence equal g,. ij .c(dvouto $30.0^{\circ}$, 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 embe wn+ cm,+kkyla;r.7qz dded in a material of index of refraction n. The laser beam emerges from the material and hits a targetq l z+kw,r7.mc+;k ayn. See the accompanying figure for the position parameters of the laser and target. The value of n is:

  95.31: A beam of light pass+cojp1*-f/+q xy-xy y/nu1nz 4 qdan kes from medium 1 to medium 2 to medium 3 as shown in the accompanying figure. What is true about the respective indices nk4yn +1*j y1y-dqq/p / z-x+fcauonx of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medd9r,/tw o+xozium 2 to medium 3 as shown in the diagram. What mo/+xtw 9o,zrd ay be concluded about the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram show1qot 94n4 yxbh d(ugu2s the path that a light ray takes passing through three transparent materials. The indices of refraction in materials 1, 2, nud1 (oh b49qu42yxtg 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 showg az.icuf/ t uoh+p1.4s the path taken by a monochromatic light ray traveling th+.agz1p uhc/f out4.i rough 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 gw+ew ph.g2r8 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 ,jh. a3nlpt2jv44el ms 00 fhuon the surface of a rectangular block of glas2 t0pv,nhlf0hejmal j u.4 3s4s at an 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 600nm is transmitted from air into a piece of glass1;9 kpnkqab a4. Which one of the labeled arrows be 4aqk9;b1anpk st indicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters5:ijvmr 0(n gq the right-triangular glass as shown. The glass has an index of refraction of 2.00 and it is surrounded by air. Whi(5 qn :vij0rmgch one of the lettered rays shows the path of the light after it exits the glass?