11.24: Two wave pulses travel)8,.rm (l m2xgs6 )fyxcqdt j:k5eiu u to the right toward a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best represent 8 iuusf) ,.qmyd62tmkxlr:)je 5(cgxs the superposition of the pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes through the aip;5c )we (yir8l i(kysr and strikes the surface of a plastic block. Which pair of statements correctly describes the phase changes for the reflected wavsy (lcwe)rik(8 5pi;ye and the transmitted wave?

  12.02: A ray of light pas0oz4v s d vcmvwu;o1-3ses straight downward through the point labeled B in the diagram shown. The ray reaches a flat mirror placed at an ang os-vo 4 du;0mz1vv3wcle $\Theta$ 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 6t6x*zydf n;r k9p f 3f6lp.eloccurs whenever light is incident on

  05.18: A student hold a hand mirror to observe the back of her head .,1 vo(gom;iqvbhn4d while standingo1ho g.4d;,bv(viqn m 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 behind the wall mirror?

  14.25: It is observed that a light ray changlrhi w4puz z a 5ni8g6*smf+/0es direction when it enters a new material. Which one of the following choices is *as6 zi+wr/4l58hu infz 0pmg the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm i40 .ovds u n- khb51ge wnb:+/msg3hypn air has wavelength 400 nm in a transparent material. What is the index of refraction of t: hd 4p/+e gb3goyb-sshmw 51k0n.uvnhe material?

  98.04: As sound travels from steel into air,+u4a)5 hd lgo0w o-q iqu99hjs both its speed and its:

  00.01: As a wave moves from one medium to a second me ( to k7clawo9t raswoq4f* vjmj39:(;dium with a different index of refracti(:ca3s*f;7wrj4to 99mto jl qo (kvawon which of the following wave properties would NEVER change?

  05.47: A sound wave generatedtw,zx.ps vj9e*+ xti3 from a tuning fork of single frequency travels from air (with zs+,t*xe.ji9vtw x p3 speed of sound 340 m/s) into rock (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 placed at the bottom of a swimming yoa u 1djrte v/1f 97yyr,k67lpool emits a sound wave that tr 1aftjev9ok y1 ydyr7,r6/7lu avels toward 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 strikes a rectangular glass block we-a qu9yphu /otfdv4p-(h.rtipq 9 -j.i 9 gu(ith an angle of incidence - . pe(jiu tr 9g-yt(oa-pudp49h9qi/vhf qu .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 towardk4i8254okmi, u jisfo a point P on a boundary as shown to the right. Which segment best represent oki8mkf,uii424so 5 js the refracted ray?

  98.17: Which diagram best represents what happens tv9*ll7a0 q6bhh +/pdu9lclgw o a ray of light entering air7phl g9lcv db+ql a/lh9wu*60 from water? Air is at the top in all diagrams.

  94.11: The critical angle of a material is the angle of incidence+qn7 q5lln ,,ffxkbc. for which the angle of re5 ,lfncxkn,+l qbq .f7fraction is:

  95.12: The principle underlying fiber optics is:e 8j9titg5 r*x

  98.36: The critical angle in a transparent substance surrounded by akv; twfk. ia3rp8.np8 ir 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 wijd5o st e+ey6/f z+ua)th 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 mater+e o6e td ayj/z5f+)suial X?

  03.15: A jeweler can distinguish b6am ;0rb dptrggl: 8*o/-grloetween a diamond and a piece of glass by observing the critical angle of the light idggrr/ ml rogt8a;6ob* pl-0: n 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 materivdz e7mc6iv a:s 9 ,u5m3k+fddal. When the light makes an angle oaku7emc6d9,d vsiz: 5d v+3fm f 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 refraction n. Tjbmi+et*6 ;3q: is hkphe laser beam emerges from the material and hits a target. See the accompanying figure for the position parameters of the laser and target. Tpqi3ih* tm +e;sbk j:6he value of n is:

  95.31: A beam of light passes from medium 1 to medium 2 to medium 3 sa043a vfzdpx. tbj,-(5tfvm as shown in the accompanying figure. What is true about the rest,a a50t3fb- z.4x s(vfmjv pdpective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium2,udr ksct g+3 2 to medium 3 as shown in the diagram. What may be concl2gk,c+d 3r tusuded about the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray takes i ;9mb1ep)r)c um(b8soo;x nkpassing through three t;9)mkob)1 ;p ce xr(bu mo8isnransparent 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 bzq3cl eo43gofp9+u9 r ea))zcy a monochromatic light ray traveling through three media.Thezz)+c3rogo9 c el4 efq39up a) 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 glas 6:v xx+n:aep9ekhc b xr;8g.ps ($n_g$=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 recta/qqt-lb*;yl4r f 6y sos i6y2wngular block of glass a6s4q qfi* yy -r6byowll/ ts;2t 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 into a prbhu1x) /v :ydiece of glass. Which one of the labeled arrows best indicates the path of the light ray v1dbxr) /uy:hafter it enters the glass?

  14.44: A ray of monochromatic light enters the right-trianghlh:; o ajrw;xn 2/e7rular glass as shown. The glass has an index of refraction of 2.00 and i;ra:7lh/o enr 2;jhw xt is surrounded by air. Which one of the lettered rays shows the path of the light after it exits the glass?