11.24: Two wave pulses travel to the right toward a rigid bkjbn:mq oeb2(w 6 u(0 xidh:,goundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best represents the suxu2 jk6(0b: d(hmb:qi ,eog nwperposition of the pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes through tht;-jo4/,f8pub; v/h cfv wjqwe air and strikes the surface of a plastic block. Which pair of statements correctly dewwpjh,o t v-fujcbf 8;q/ /v4;scribes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward;q.wc--cfy s vlp/2nxj k/ y/m through the point labeled B in the diagram shocvlf-- / / yyjxw2/kqcs.p;n mwn. 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 reflectionmz(6 y p/ v9+lqmhqk2f occurs whenever light is incident on

  05.18: A student hold a hand mirror to observe the back of her head typi7/ ws7g*6inu 6m2s+czk/ x6qehdwhile 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 behind her head, she will see the back of her head how far 2zs q 7it mucseyd*g76iwx6+pkn/6h/behind the wall mirror?

  14.25: It is observed that a 0t6e ;rgfjk7 elight ray changes direction when it enters a new material. Which one of the followinre6 7f0g; ejktg choices is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavelength 400 n2ijc b-im f1g1m in a transpar-i1m1 jgc 2ifbent material. What is the index of refraction of the material?

  98.04: As sound travels from steel into air, both itud(lspe ,2p3y*50dhmddwvr :s speed and its:

  00.01: As a wave moves from one medium to a second medium with a different index:qgg 76t cal lj/ey.d8 of refraction which of the following waval7lg6.e dyc tq:jg 8/e properties would NEVER change?

  05.47: A sound wave generated from a tuningqz*pc +)6bg ju fork of single frequency travels from air (with speed of sound 340 m/s) into rc q*6p+ zg)ubjock (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 speaker xy* 4m0ym.:6puclvd jplaced at the bottom of a swimming pool emits a sound wave that travels toward the surful 0:px ym v*jy.64cdmace 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 0lhp 1ixk6o o)strikes a rectangular glass block with an angle of 60)l ioo1khp xincidence 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 boundarys-y.n8)dfg fcsi2sb/ as shown to the d)n.-2s byisf f8c/sg right. Which segment best represents the refracted ray?

  98.17: Which diagram best represents what happens g4vne/ 4/:azo jioe9ujr9 wz,to a ray of light entering air from water? Air is at the top in all diagrams.:4j z 9o/evnjzo g4/w9reia,u

  94.11: The critical angle os36v b0qmfd-q f a material is the angle of incidence for which the angle of refraction is:q dbfm-3v s06q

  95.12: The principle underlying fiber optjkw( ;tcoog:;sp). vb ics is:

  98.36: The critical angle in a transparent substance surrounded by air i zu uu,fl :6:xx7-;bdyiv6r abs $30^{\circ}$. The speed of light in
the substance (in multiples of $10^8$ m/s) is most nearly

  01.28: Light travels from material Xm l6*t px60ev3p nu6kr with 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 mater e06t6k mr*6puln3vpxial Y is v, what is the speed of light in material X?

  03.15: A jeweler can distinguish between a diaqre ),hfnz0kx8)r.lx mond and a piece of glass by observing the critical angle of the light in each material. Glass with an indxrhe8l0z )f. n, )krqxex 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 makes )zi7+lrmf wt2an angle ofl7t2z)r+f wim 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 embedqkyquf:6 4 w/fk b 96n.zqe.jkded 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 laser and target. The value ofq.q.ykffnuz/ k6k:6 4jqwbe 9 n is:

  95.31: A beam of light wyrd j(r15ch;1 txqq+ passes from medium 1 to medium 2 to medium 3 as shown in the accompanying figure. What isr1wr51htqyd cj+(;qx true about the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light gdfbzmclu1a os2*qzr- .n pg/xr,;3 q p2(j;jpasses from medium 1 to medium 2 to medium 3 as shown in the diagram. What may be concg azc.f,q*d n32x ;s1r 2jz m-buop;gj prl(q/luded about the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light r rdcltut-ud184ek 4z 0ay takes passing through three transparent materials. The indices of refraction in materials 1, 2, and 3 are n1, n2, and n3, respectively. Whu014tdcrkz 4 eu8-ltd ich of the following best describes the relation between the indices of refraction?

  09.34: The diagram below shows the path taken by a monochromaxx z lf;:ba.d o:p1.gitic light ray traveling through three media.The :p .1;:ad.b xxoilgf zsymbols $v_1$,$\lambda_1$ , 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 gi y8 2s9a97wit*endvwlass ($n_g$=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 surface of a rectangular block of )+,bt/fu 5kok mp)zhd glass at an angle tkzbo/p f5 d+ukm,h))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 afapvijs 5::lj(1ed/+ mxskf njr;;e 5ery, a, piece of glass. Which one of the labeled arrows best indicates the path msf + e eaxs/5,y: pd;(; lj,r1k aijjren5:vfof the light ray after it enters the glass?

  14.44: A ray of monochromc-ws62x+jsf8 r,s mn6 g9mwbdatic light enters the right-triangular glass as shown. The glass has an index of refraction of 2.00 and it is sud26wjf,wmsx+ sm9bgrcs n- 86rrounded by air. Which one of the lettered rays shows the path of the light after it exits the glass?