11.24: Two wave pulses travel to the right toward a rigid xlv4ib)* b r-m)r )yp o)yih1xboundary as shown. After reflection of the triangular pulse, the pulses wylbhr4rby)i-v)) poixm) x1*ill 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 throughbz: ii868i 0xwbsrki/ the air and strikes the surface of a plastic block. Which pair of statements correctly describes the phase changes for the reflected wave and the transmi 6s8bwr ixi/bz: ki8i0tted wave?

  12.02: A ray of light passes st kz7wc6a 6b irtzw-t.-cq2 9j(e uz;rbraight downward through the point labeled B in the diagram shown. The ray reaches a flat mirror z9 it6 w-t(e jbu.cz7w-rk;aq6z2crbplaced 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 incjw, g7plw;pg,y s6np *ident on

  05.18: A student hold a hand mirro h*k,yu qj 52nz)4rgfbyq:)tjq4 twj4 r to observe the back of her head while standing in front of and loo ntgq )r:zj*hu4by4yqf j4j 2k5, wt)qking 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 when it enters a o j/hz)6m:ykngs7f)i new material. Which one of the following choices is the term best associated with this phenomyzo/i6: ) jks7nfhg m)enon?

  96.19: Light that has wavelength of 500 nm in air h ,5 -b:f;,) imqcjlbhejr9jq has wavelength 400 nm in a transparent material. What is the index of refraction of the materi9,bj b:;fr h qhjqjim,c)5l-eal?

  98.04: As sound travels from st *fl ,;p zc da-.yp1jgzd)ag4z0 vsm4neel into air, both its speed and its:

  00.01: As a wave moves from one medium to a secondha5 d:l5py.at b ,g: vtyi41xd medium with a different index of refraction which of the 4t5b1v a:il h x:d.dyp5agy,t following wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of single frequency travels frxhb0hrz d/4p) m, d2:9qwdtdkom air (with speed of sound 340 m/s) into rock (with speed of sound 1500 m/s). Which statement is true aboutw4dd ,dhz 2 9 /k)tmrx0:hqdbp the wavelength and frequency of the sound as it passes from air to rock?

  14.28: A waterproof speakesx57gv;gyha 3 r 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 wave has gsagvy5 7h;3x 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 block witcos3zupla m ;k-,-s3uh an angle of incidencass-mu3oc u p -,;kl3ze 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 show+i wvmzbteo 2v1 9l.p6n to the right. Which segment best represents the refracte m6zlw+opt9. 2ebv 1ivd ray?

  98.17: Which diagram best represents what happens to a ray of light entee7m5ijr ift isp3le;ptw0 +, 4ring air from water? Air iriemp;w3j+p,f5l t 0 es74i tis at the top in all diagrams.

  94.11: The critical angle of a material is theey4,9.c b k v.fhe h1tvb:6okw angle of incidence for which the angle of :f6wy.tvvbehck b4 e9.o h,k1refraction is:

  95.12: The principle uno/ ;c*q5xr) /xuq wlx;zj8gflderlying fiber optics is:

  98.36: The critical angle in a transparent substance surrounded by air.oj6u2du9r 3 cdn1bkh 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 indo+wa/o q ,zs8sex of refraction of n = 1.5 to material Y with an index of refractio,+szo a8w/ sqon 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 between a diamond an vu0jw(8 u(kvokwp4; md 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 anglp4kwvmwu; k8v(ou (0je 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 materie+.t3 x.of6hs+eg :u 3tub+uavye q +fal. When the light makes an angle of incidence equvfueg .txe f:.hs+t3qyaob6 ++ 3e+ uual 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 n,mu*2.fzrw4 5 yqwtblaser is embedded 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 position parameters of the f. mw2tqnr*u 5, 4zywblaser and target. The value of n is:

  95.31: A beam of light passes from medium 1 to -t7bgk*y wil.r2eotx g44efp-d:c h 7medium 2 to medium 3 as shown in the accompanying figure-y:4fe4o gl*er77- g2pw c.txib k dht. What is true about the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to med1 m0 qiwndlznk b0mc)9.lyj2 .ium 2 to medium 3 as shown in the diagram. What may be concluded about the three indexes of . n mzjlqy2m1).nbl0cid0w9k refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path/ 3/amsgi4hm /lqqq(u that a light ray takes passing thro4/( /gl m/h3qsqaq umiugh 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 the indices of refraction?

  09.34: The diagram below shows the path taken by a monochromatic light ray trave51fcz(g6 p 1huq* btuyling through three m thp5 *1(c6b 1uyufqgzedia.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 glass (pnwlb;4 y wrv:.sy 5q8$n_g$=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 incideaynwji -a 3x1kfyp8rq5w 2,1ont on the surface of a rectangular block of glass at an angle ofw8xpaqi 3n5j 11yowr2y a-kf, $45^{\circ}$. 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 trans xe.uc2 (+no lfn6bjzw4s*9pymitted from air into a piece of glass. Which one of the labelec.b*u4(x6+ sf2nj 9ynewpo zld arrows best indicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters the right-triapoq8w1 vux x(7rno 39fngular glass as shown. The glass has an index of refraction of 2.00 and it is surrounded by air. Whio fu 3r( qn1vx98xpw7och one of the lettered rays shows the path of the light after it exits the glass?