11.24: Two wave pulses travel to the right towl aeg; mo us/*o*rmp1md.y,a1 ard a rigid boundary as shown. After reflectie*pg1ylrm /aua*,mo s;o .d 1mon 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 pulses coincide?

  08.30: A light beam passes through the air and strikes the surf3 gbbr.j 9n*imace of a plastic block. Which pair of statements correctly describes the phase changes for the reflected wave and thebngr3 .i9mj* b transmitted wave?

  12.02: A ray of light passes straight downward throfp9wj. jzl zg-d(0jp3 ugh the point labeled B in the diagrafdzj3zj(l wppj0 - 9g.m shown. The 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 reflection occurs whenever light is incident osnz8 1qcidcd2vcrr*4 v - sc:;n

  05.18: A student hold a hand mirror to observe the bacf0+7ufwzk2 tyk of her head while standing in front of and looking into a wall mirror. If she is standinfz 2kfu 0y7+wtg 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 8ilhh-sj 76ler 7yj,pthat a light ray changes direction when it enters a new material. Which one of the following choices is the te8h, ejs -ryp j7i7l6lhrm best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavelength 400 n; d3fy zza 4bbo8n,b6mm in a transparent material. What is zm6adz,b y84b; n3fobthe index of refraction of the material?

  98.04: As sound travels frowyb074 g v1k-qdysf*rx:p16 lh -mz6fcix 5 olm steel into air, both its speed and its:

  00.01: As a wave moves from one medium to a second medium with a difvq, nv(x;)s jkferent index of refraction which of the following wave jvn,;q)sx( vkproperties would NEVER change?

  05.47: A sound wave generated froxte;* e ie8(nzm a tuning fork of single frequency travels from air (with speed of sound 340 m/s) into rock (with speed of sound 1500 m/s). Which statemn8e (xezi; t*eent 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 swimming pool emitsfls 5rugs -1qhm.xn .1 a sound wave that travels towarx1g n srs u5f.l-mq1.hd the surface of the water. In the water, the sound wave 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 strit1:td1n1 b)w q/lp bthd: nym3kes a rectangular glass block with an angle of incidence t3 lntp:d/1:n 1 1hbbydmwq )tof $0^0$. 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 b-w;n2eh34de* nr1gepvtei w4 oundary as shown to the tn n4*-r4gh 2vw wep3di1;eee right. Which segment best represents the refracted ray?

  98.17: Which diagram best represents what happensdbt,q.sz5k, 6sd jp-oqc(s- z to a ray of light entering air from water? Air is at the top in a(s,op-6 qtzsz,ksq 5ddj-b.cll diagrams.

  94.11: The critical angle od- m8o m +kbj1,n-baxyf a material is the angle of incidence for which the 1 namybm-x8d-,bk j+o angle of refraction is:

  95.12: The principle undh7u(et8ry qk0 erlying fiber optics is:

  98.36: The critical angle in a transparent substance surrounded by air is 6n vi,,mt4dd o$30^{\circ}$. The speed of light in
the substance (in multiples of $10^8$ m/s) is most nearly

  01.28: Light travels from material X withm:pt y2wtk/ *ot5swz4x1qp:y 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 material Xwwsyz ttq2/x 15pyt*4m ::pok ?

  03.15: A jeweler can distingi0cxgk fh0e;ms scd n/ 97kr*0uish between a diamond and a piece of glass by observing the critical angle of the light in each material. Glass with an index of refractkkineg fd cr;0s/*00mx9h s 7cion 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 cle74vmu(d4s kn)jg )yb l.hp,q bar material. When the light makes an angle of incidencm4 j)4gn)(vplhy,qbskdu 7. be 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 2dvayk6j ,:bky1s9v8/ zxsmrembedded in a material of index of refraction n. The laser beam emerges9 vssza8, y 6:myvbk jr2k1d/x from the material and 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 light passes from medium 1 to medium 2 to medium 3 as showtx+gjvxl*. 7ba /ob is7q, h+gn in the accompanying figure. What is true about the respective indi l.v gxjt+gqx7h*bi + 7bo/as,ces of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to mee)+/r.w. s cus o qwy8hhn4f.qdium 3 as shown in the diagram. What may be concluded about the three indexes of refracyqh 8)4o.+c.unsqw rhw /.sfetion, n1, n2 and n3?

  97.24: The accompanying diagram show8h6yv v qtg(8as 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. Whic8q8 hgty (6vvah 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 tr:-yvyh6s o u4uaveling through three media.The symbolsu:6o4- hyuvy s $v_1$,$\lambda_1$ , 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 traveli) k uaz1 70n,ygzhw0tgng 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 g+uo g+k.yva 7;b d,qksurface of a rectangular block of glass at an angle of 7o a gq;d.v,gbykk+ +u$45^{\circ}$. 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 6l xkd1h*5y.xzrp j 3o*/juvv:00nm is transmitted from air into a piece of glass. Which one of the labeled arrows best indicates txyp j zv h jd/xv31*l5u.k:or*he path of the light ray after it enters the glass?

  14.44: A ray of monochromatic4z6c:ce xs oppgs5bjbs 4534zw1bt9 f light enters the right-triangular glass as shown. The glass has an index of refractiogs5 4jfsp5we xcbb4963 pz s1tcbz:4on 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?