11.24: Two wave pulses travel to the right toward a rigid boundauf8ra/ohbp,m u9z*,q5cs hf/7aw1 qjry as shown. After reflection uz9 f p5/hqa*7bj /m1us ,,rwfhq8 aco 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 surfbf+ hjh4tf,os /:y7j nace of a plastic block. Which paj4hts,h/7y jof:+ n fbir of statements correctly describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight h ifx..ano.+tg 3jk /mdownward through the point labeled B in the diagram shown. The ray reaches fajkm3n o t /+hxgi...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 ligj ,l7gba6 p7l//lvpy lht is incident on

  05.18: A student hold a hand mirror to observe the back of her heebh2ipok; s,a ,+ jx3;nibt +gad 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 holds the hand mirror 1 ft bak;bphi o,x+egntib j2,; 3+ sehind 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 directioo **ztrvnxvk -f,1e,;.ikzj vn when it enters a new material. Which one of the following chotxfn* ,e ov z v*vz.,-kkri1;jices is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air 3 uwh. njqs5:wrf:fp:has wavelength 400 nm in a transparent material. What isrs::nuh. qpfj:w5 fw3 the index of refraction of the material?

  98.04: As sound travels from steel into air, both its 7m w7m.7blgqdspeed and its:

  00.01: As a wave moves from one medium t cxoqq36*0xno *hgkx 5o a second medium with a different index of refraction which of the following wave properties would NEVER xnc*6 oq0kg5qxx3 * hochange?

  05.47: A sound wave gena924up 96byn prh 0iaem) fla,erated from a tuning fork of single frequency travels from air (with speed of sound 340 m/s) into rock (with speed of soundiaf9r a)9n4umh e 20,p6ylapb 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 swimmin qjc2q,d4v7yp g pool emits a sound wave that travels toward the surface of the water. In the water, the sound wave has a freque,jq7pvd yc q42ncy $f_{water}$, 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 rectangulao3abh ks,c39 kr glass block with an ang3 bak ok3ch9,sle 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 bou spev/bz5sdha7 op 1yk+it24 f60 .cosndary as shown to the right. Which segment best representscsb76f0 svzya5h2 o4optik/.+1pesd the refracted ray?

  98.17: Which diagram best represents kp/ e2yze+q c-pz)v, ewhat happens to a ray of light entering air from wapzykzee/ -+qv)cep2, ter? Air is at the top in all diagrams.

  94.11: The critical angle of a material is the angle o9 ,9osagfrz-zdou j, )f incidence for which the angle of refraction ,)sod r9fao-g u z9,jzis:

  95.12: The principle underlying fiber fmoubs ,+4b w01wij w;optics is:

  98.36: The critical angle in a transparent substanm;od2hvo d8(4iae f:tce 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 material X wit/nsn f8bp::bh3)n w.tufg hylsy1 3,ph an index of refraction of n = 1.5 to material Y with an ,unnnbhp)ft3 p yws/:h b l8 1:.sf3gyindex of refraction 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 and a piece dvy8i6ohcwu. 8g+vp2yia 6.iof glass by observing the critical angle of the light in eachviwgv +8cap6. o68yuh yi d.2i material. Glass with an index of 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 material. When the light makesepo(p n8wzj+ 89tt(cg an angle ofpzt opgw8 (8cje( nt9+ 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 embedded in a material of index of refra6a 8b,adkpp htf3uw 6ong *5g6ction n. The laser beam emerges from the material and hits a target. See the accompanying figure for the position parameters of the la*3wp6t a u5fbdnhopk,8a6gg6 ser and target. The value of n is:

  95.31: A beam of light p uqq, 3n5 q;k jj6m88ovag(ffvasses from medium 1 to medium 2 to medium 3 as shown in the accompanying figure. Whatqquf(qk;o ,f5v8nm ajvg3 6j8 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 as svn7e .a dwe*.qhown in the diagram. What may be concluded about the three inde .andveqe*7. wxes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray takes passila 6bmp(p0o y,ng through three transparent materials. The indices of refraction in materials 1, 2, and ypba0 lo,(6pm 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 ms 2 .fq2xrtqej; m4ixmv,7na5onochromatic light ray traveling through threjr7xf,e;ti vx2 as2nm 5qm4. qe 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 travelin5)oeg dh2 (yxlg 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 surf,:ss0xbdr s ip9 )zp:mace of a rectangular block of glass at an angle p 0: rs,m9sbdzpsx:i) 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 pieom1lm:ly5s -1soa6x rce of glass. Which one o5 y rs1s1- lx:6almomof the labeled arrows best indicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters the right-triangular glass as sho i 9:mcjzk39n7ppmb:1 k+a ioqwn. The glass has an index of refraction of 2.00 and it is surrounded by air. Which one of thcimz39obm:jpq+: i 9a1kp 7nk e lettered rays shows the path of the light after it exits the glass?