11.24: Two wave pulses travel to the right toward a rig0w()opx .mq brid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best represents the superposition of the pulses when the centers o0qwr m)x.bo p(f the individual pulses coincide?

  08.30: A light beam passes throug nzzf,mo 481mfpl e(blv*( g vvq n+n;*(6dsnfh 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 transmitted wave?,(o4v pqzn ( 8(bf;mens+n d lnv*1fl fmv6*zg

  12.02: A ray of light passes straight downward through the point labeled B 7d pil1 ,ksvsb/i 01ptin the diagram shown. The ray reache10 sp sdvb17lp,i/itk s a flat mirror placed at an angle $\mathrm{\Theta }$ 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 light isl//02wkw,qp qsy 4fci incident on

  05.18: A student hold a hand mirror to observe the back of her h60 p hrym 01oad1pk-euead while standing in front of and looking into a wall mirror. If she is standing 4 ft in front 1 e pu0o60-ahmy1rdkp 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 25eky(dkx34) myyzimu84exk direction when it enters a new material. Which one of the following choices is the term best associated with this phen4yiue 2k (d3zyxm84kk 5 xmey)omenon?

  96.19: Light that has wavelength of /7u we1tc-lxd500 nm in air has wavelength 400 nm in a transparent material. What is the index of refraction of-wlc1dxeu/ 7 t the material?

  98.04: As sound travels from 34nk dx iy:/ ubk ,hv;05dl*wc zhs6kusteel into air, both its speed and its:

  00.01: As a wave moves from one medium to a second medlc4w:uzj3h)5 fq 8k cdium with a different index of refraction which of the following wfchuc:)l5 zqd3j8wk4ave properties would NEVER change?

  05.47: A sound wave generated from a tuning forail3 v lflm: 0l3o4-wuk of single frequency travels from air (with speed of sound 340 m/s) into rock (mll:l-3wa 0 l3u4ivfowith 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 thz-* mhtt(w+eze bottom of a swimming pool emits a sound wave that travels toward the surface of z(mz+* tt-w ehthe 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 stri.n;uoo.xk+ov kes a rectangular glass block with an angle of incidence ox; ovoonu+.k .f $0^0$. 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 poio r.usvd.(c 1ynt P on a boundary as shown to the right. Which segment best represents the reu1o. c sdr(v.yfracted ray?

  98.17: Which diagram best represents what happens to a ray of light e; zl0lr nwq.e1ntering air from water? Air 1.w0elqrz;n l is at the top in all diagrams.

  94.11: The critical angle of a material is the angle of incidencg suwmwp*/dnr q9 9x16c5 ydxd, t.4dfe for which the angle of refraction d95dsxqpr xtww1cd/g u* nm f4d96.y ,is:

  95.12: The principle underlying fiber optics ih +x(vve/yosrc 4 :eg.jb*l-hs:

  98.36: The critical angle in i(j; xgtxv b//a transparent 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 = 1.5tn;yk qt /r-9w7 e;u8*wwh sjr to material Y with an index of refracwhr8qrjs t / y7;enkt9wu ;-*wtion 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 nb: .vg lq7n 2uza.k*jbetween 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 7zk2*bagvj.q:. nul nhas 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 clenh:do .k 9zc aj+ /e4xesk89vru8bh6har material. When the light makes an angle oek 9 u4h89n+baxjsvekz8rc.oh/h 6:df 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 emvq t-,ty5x f;rbedded in a material of index of refraction n. The laser beam emerges from the material and hits ax ;t y-f,vqrt5 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 passes from medium7hpb . ggcpj8, 1 to medium 2 to medium 3 as shown in the accompanying figure. What is true about the respective indices of repjg8.bp c, 7ghfraction (n1, n2, and n3)?

  00.14: A beam of light p vm8sn2 3pr*g3 b9dovjasses from medium 1 to medium 2 to medium 3 as shown in the diagram. What may be concluded about the three indexes of refractirgv3o*9 mn 2d b8vjps3on, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray takes passingxk;hw918l uur- :w5ok0 xdfpq through three transparent materials. The indices of refraction in materials 1, 2, and 3 are n1, n2, and n3, respectively. Which of twp5wxok-h1 d ; l09xquf8:ur khe following best describes the relation between the indices of refraction?

  09.34: The diagram below shows the kmlvu 6rpz0,-i6*ofm path taken by a monochromatic light ray traveling through *fmp 0 im,kou-6vlzr6three 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 trave1 cnf;xvh4j5o(1dx sz ling 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 t(phlf)*9jz3nb 1cjv t he surface of a rectangular block of glass a 1)f*ljp3n(bvt hj 9czt 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 6m0i9c3yi p wmy,1 qz5u00nm is transmitted from air into a piece of glass. Which one of the labeled arro mcpmwqyizu, 1905yi3ws best indicates the path of the light ray after it enters the glass?

  14.44: A ray of monochrom:)alnwvujk;7c6fg w z(0p- jvatic light enters the right-triangular glass as shown. T;u cnk(0g v- ):wafw jpz7l6vjhe 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 the light after it exits the glass?