11.24: Two wave pulses travel to the right toward a rt ffdrm;znf m+awld95 /e0 :a6igid boundary as shown. After reflection of the triangular pulse, the puls/ eman05fdw +zaffld:;tmr69 es 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 pasgmk* ydu2+ak y4nwv-gwck mk4a;k)3,ses through the air and strikes the surface of a plastic block. Which pair of statements correctly describes the phase changes for the reflected w 4kk4k avy)3mw;*m,wkadk-nugc2 gy + ave and the transmitted wave?

  12.02: A ray of light passes straight downward through the o2 vz(skpc5q7 point labeled B in the diagram shown. The ray reaches a flat mirror placed 7cv5(szkp q 2oat 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 whenevecab3+5rt1 a8jw hfd/nr light is incident on

  05.18: A student hold a hand mirror to observe the back of her head whilt- hrw5b(gp7qe standiqtbp7h w (rg-5ng 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 changes d-;ap v1+l6uc2 w hmqhlirection when it enters a new mateulq;-cpv + 6ahlw2 1mhrial. Which one of the following choices is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavel rwam)1xy9 c1zength 400 nm in a transparent material. What is the wa 1yxc1)mrz9index of refraction of the material?

  98.04: As sound travels from steel into air, both its speedd (9, q*ukqv l)lvh(zd0z0yexb:gi q:2:myb x and its:

  00.01: As a wave moves from one medium to a second medium with a different inds(ts:;znl*zr tch imm :ekb// a,h ;,eex of refractiotab :lz:*t,ce h(;r / smie; zsn/,hmkn which of the following wave properties would NEVER change?

  05.47: A sound wave genen 1n6mmu jplvzl .7z90rated from a tuning fork of single frequency travels from air (with speed o.nu96zz m p10jlmn7 lvf 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 bottolwton3jczo e- 1l: .q:m of a swimming pool emits a sound wave that travels toward the surface of the w3qlzco:l wjn e.t-1: oater. 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 stri3 ,9f,t+qsk w nweuu0vkes a rectangular glass block with an angle of incid vq0 u,e9tfsun+kww ,3ence 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 togd1 4oh-) /bn qptr.d**r tasz ja7qj2ward a point P on a boundary as shown to the right. Which segment best represents the refract2 7 s -oj*atg)qj/rz4d1rpq*hb .a tdned ray?

  98.17: Which diagram best represents5lp,n/bj.2 ydtr k8f s what happens to a ray of light entering air from water? Air is at the top id.5kty lbj8 p/ 2nr,fsn all diagrams.

  94.11: The critical angle of a material is ttsh gq.fa o :uyt15u8)he angle of incidence for which the angleasq :o8ugtt)f y5 1uh. of refraction is:

  95.12: The principle underlying fiber optics ,pe.ww *hd 3e ),mvrpxis:

  98.36: The critical angle in a tranb z4k/bh8q4 q0lvped83xbc9 dsparent substance 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 with an index of refraction of n = 1.5 to m7ng5 mse,kg0y7zo )wraterial Y with an indenyw0g7mk sz7,5or)g ex 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 bozqex ng))rttw+;/ :distinguish between a diamond and a piece of glass by observing the critical angle of the light in each material. Glass with an index of refraction of 1.52 has a criticatbneg;ztw /)) :qorx+l 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 int to-c1cdqn o3-o a clear material. When the light makes an angle of i1 o-n3dtc -qconcidence 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 inxs ,. 7iwc.ak-ly*rrm dex of refraction n. The laser beam emerges from the material xrwl7 *acykm .rs.i, -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 pzj ;8-ciyu2tf fj 00ax*w8ws tasses from medium 1 to medium 2 to medium 3 as shown in the accompanying figure. What is true about the respective indices of refraction (n1, n2,y f0w ;2cit jawusjz0 *8-8txf and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to medium n /72lnevr9hydmx/m59mh aa t,efz1 13 as shown in the diagram. What may be concluded about the three m /zalnmfv 92xe 9mh 5r/ny,11 aedh7tindexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path thani 2xp; rptkau4h7*, (mzyf(. /ad kwht 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. Which of the following best describes (2yaupz* k4 t7hd(;i xfn.k h, wamr/pthe relation between the indices of refraction?

  09.34: The diagram bvmuh; ;yz vwwz/7o h17elow shows the path taken by a monochromatic light ray traveling through three media.Thz/w ;m1hzv wv y;uho77e 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 liga jeb2wgry.)g 48 ujwdi09yq1lm+ n4z ht traveling 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 thekwb+:b8i:cbkfo8 e i wc17 p9d surface of a rectangular block of glass at an angle oicfd + bbwb7o81e:k8c k:iwp9f $45^{\circ}$. 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 2qm0/w2cnbe ypiece of glass. Which one of the labeled arrows best indicates the path of the light ray after it enters the glaq0y2w2ne/ c mbss?

  14.44: A ray of monochromatic light enters the right-triangular glass as shown. 7meh3 i o;*qqcThe glass has an index of refraction of 2.00 and it is surroundedeo q*mqc3i;h7 by air. Which one of the lettered rays shows the path of the light after it exits the glass?