11.24: Two wave pulses travel to the right toward a rigid boundary as shown. A)ou bhgin9 o9;ki, diju)z+4sfter reflection of the triangular pulse, the pulses will interfere. Which one of the following picture+;h 4j )i9koodsnizu9bg)ui,s best represents the superposition of the pulses when the centers of the individual pulses coincide?

  08.30: A light beam /0c+as0-eh.wea3jl y mieb ra :cu y39passes 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 the tci c:jb3ls. ry39m0- au /he0eeawy+a ransmitted wave?

  12.02: A ray of light passes straight downward through th9 w:-hhx i+by9gh 4r s0-itsnxe point labeled B in the diagram shown. The ray reaches a flat ywhih9s gx b+-t0- 4snxri9h: 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 reflectiot0s/-vl 9rxs cr1.ej pn occurs whenever light is incident on

  05.18: A student hold a hand mirror to observe the back of her head while standyj1 np;mjk2 :r38 )xqyxi d6bting 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 2y:n1kd6p8 r qj; xbmijy x)t3hand 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 dir)sv,*yi 9a mriection when it enters a new material. Which rsa m*yivi,9 )one of the following choices is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm iuozsg5dy*(8r4gl.o h n air has wavelength 400 nm in a transparent material. What is the index of refraction of the materia845rs* g uzyhg. lood(l?

  98.04: As sound travels from steel into air, both its speed and it/v.q p.z/vn+) fhnltys:

  00.01: As a wave moves from one meaprk34 jj l/(vdium to a second medium with a different index of refraction which of the following wave properties would NEVER kj(j pvral4/3change?

  05.47: A sound wave generated from a tunys- 2aj)d hws/0sx0qning fork of single frequency travels from air (with speed of sound 340 m/s) into rock (with speed of sound 1500 m/s). Which statement is true about the waveljysnd/s)0w s q2h0-x aength and frequency of the sound as it passes from air to rock?

  14.28: A waterproof speaker placed at the bottom n1 wl e+uqa:y/of a swimming pool emits a sound wave that travels toward the surface of the water. In the water, thwly+e1 :aq/n ue 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 strikes a re 80m)izq p*mxg;nk(lh qlqw-; ctangular glass block with an angle ofqm8lwh;pq-()izqlk nm* g0 x; 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 boundary as shown to th( ktmq)iya:. gsb bx.1e right. Which segment best represents the refracted rx1gs(b.a : q)b mk.ityay?

  98.17: Which diagram best represents what happenstd64 xv)s lxa5xc2qp3x*j j:a to a ray of light entering air from water? Air is at thev4 c *:)qx36xslxaaj 2xpj td5 top in all diagrams.

  94.11: The critical angle of a material is the angle of incidence apsmc 1 zf7fpo lh(:g*jg33t; for which the angle of refract a(*s pjgz;mc7gplt3o:3f1 fh ion is:

  95.12: The principle underlyin1a9khuubvpiv)3y6 -j g fiber optics is:

  98.36: The critical angle in a transparent substance surrounded by .krdy72 5l 4v (gtxmk 9..uwto-d bzobair 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 fr p* 5,ko+u8q6xzhnoindex of refraction of n = 1.5 to material Y with an index of refractiooo8+h,pq*z5kurfx 6 nn 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 distingui-y2ue x+c8jm)6 vwt)l .cy)bb0 otlttsh between a diamond and a piece of glass by observing the critical angle of tt)occtlub -6.yjmttv y+) 0 wb )lx82ehe light in each 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. Whaqe3doyk w1)) jyd u 1l-qt3)v,g1r nfen the light makes an angle of incidencey nd-w1)e , v tq)fgld)yq1133aroukj 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 o1 lcqasq6t1i gjx)3-h f index of refraction n. The laser beam emerges from the material and hits a targetqi1t)sxc 6q1 j ah3lg-. 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 9gyk.mdcq zb0 i5 7+r8cq :mwfas shown in the accompanying figure. What is true about the respective indices of refract mfb zcwg0.y8q95rk+7cm:qidion (n1, n2, and n3)?

  00.14: A beam of light p lro64hs)v- sd0 e)ex( r.b3hfuqotm*asses from medium 1 to medium 2 to medium 3 as shown in the diagram. What may be concluded about the three indexes of refraction, n1,.64)xe lqm3*hsv- her(0 fo bt dos)ru n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray takes passi+6rk 8fcydc inwg zp23lxa68+ng through 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 offg 26w 8++nrc8pkalyz dcx63i refraction?

  09.34: The diagram below shows the path taken by a monochroma-jznzr ::u 6fntic light ray travel: njzun6fzr:- ing through 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 glass in y/vr y;; 9bisco5e9q i(+za($n_g$=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 incidentira vgb0,o24ev2wya w na;w ),1qfib4 on the surface of a rectangular block of glass v42o4iw wb0)f2;an vq ,wreb a1yg, aiat 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 x0np14 -ra0mmoye7bq: omjkgbn9c3. into a piece of glass. Which one of the labeled arrows best indicates the patexoro-1bm:qmcp n a9 n g3.4y00mkj7bh of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters the right-triangular glass a om.y td);pjo:s shown. The glass has an index of refraction of 2.00 and it is surrounded by air. Which one of the lettered rays shows the path of yoo): t p.m;djthe light after it exits the glass?