11.24: Two wave pulses travel to they 9vv12e fs5mk right toward a rigid 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 of95sv2 mekvf 1y the individual pulses coincide?

  08.30: A light beam passes through the air and strikes the surface of a plast.b s e4jh* p5s3p;bzcbic block. W35s bh e;.zb pb4c*jsphich pair of statements correctly describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward through the point labe2mbunj1 .g 44kxubc7 oled B in the diagram shown.. k4cuug 4o m712xbnjb 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 reflectionz006eu 6ecu mn occurs whenever light is incident on

  05.18: A student hold a hand mirror to observe thqx7:8hhfz t9tm+7gw o e back of her head while 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 h+7:x h gz9t foh87tmqwead, she will see the back of her head how far behind the wall mirror?

  14.25: It is observed that a light ray changes directaa b1:/:9lbxn avzd*i ion when it enters a new material. Which one of xn*:9aiv1l zbab/:ad the following choices is the term best associated with this phenomenon?

  96.19: Light that has wavelength o gbz,g562*b wzn;y;, 8-k g9uy u+ket dzmwrvpf 500 nm in air has wavelength 400 nm in a transparent material. What is the index of refractioe ,zyguzvgwz 6 tk82w+9ukrpdn5;bgm-yb* ,; n of the material?

  98.04: As sound travels f7zuz1vh lr1*- -v aopmrom steel into air, both its speed and its:

  00.01: As a wave moves from one medium to a second medium widj204s+yp efw1. fw7 z mio7pqth a different index of refraction which of the27w pf1yef7ozmi0qs+. dj pw 4 following wave properties would NEVER change?

  05.47: A sound wave generated from a tunine-imob h4i8q ;g fork of single frequency travels from air -o8;qhm iei4b(with 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 placef;wc,/ bts5h-*u cwrgj x6r5t d at the bottom of a swimming pool emits a sound wave that travels toward the surface ofchwb gtu,s/6wfrc5 -rjx; *t5 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 glasscsh ;z kw m mq7,yw+acjt-/,)q block with an angle of i7yzm,cc/ -+w htq,j)w qsak;mncidence 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 1hs(ep; .8t(fyiqvb spoint P on a boundary as shown to the right. Which segme(eyhs v (tbp1q.8; isfnt best represents the refracted ray?

  98.17: Which diagram best represents what happens to a ray of light enb5 bn2sz axdli(:y 0:ntering air from water? Air is at the top in all di5b(ds izn x0l:y :ba2nagrams.

  94.11: The critical angle of a material is the anglegxo,u68 p ixd./af al) of incidence for which the angle of refrao a/,x8ulxg6p.)ad ifction is:

  95.12: The principle underlying fiber optics isxa2l4b w6)zfe/)- wrj qqc-ni:

  98.36: The critical angle in a transparent substance surm/j zhr +e x3cn0j8e:lrounded 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, :dknvucy3zcfv2 r)- X 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 material Y is v, what is the speed of lighv2- yznvc3udf)r ,ck:t in material X?

  03.15: A jeweler can distinguish between a diamond and a piece of glasi h2n8 on 8az7o(fn9ro /t,ydms by observing the critical angle of the l7t,8 ofiony nmh(on982r z ad/ight 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 gx dd9rl1 (1asq4 hplsugl;0,material. When the light makes an angle o gr1sa(0 ug;,lxp9dq1s d4lhl 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 refrac0pn* l np4tw 4/q-gr*vfp+x+ dzqqgd;(r9svg tion n. The laser beam emerges from the material and hits a target. See the accompanying figp4p-gs+nvztw (9 pngx*+q q d/4rrg0 lqfv*d ;ure 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 m1.dr2ifgx4*- epsyd fedium 3 as shown in the accompanying figure. What is true about the respective indices- pyf2ix1de4gd *rf .s of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medi6m9 ft;vzcm0s um 1 to medium 2 to medium 3 as shown in the diagram. What may be conclsvc6;mtm0fz 9uded about the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray tz3 c)sr;vp.bh akes passing through thr3r.c)b; szphv ee 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 of refraction?

  09.34: The diagram below shows the path n *ij bkska5lv3j6wk8,lp rqsfi+ +04 taken by a monochromatic light ray traveling through three *vf+splq6wk,8kljbrjsin3 5 a+0k 4i 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 (tf:d 5dk k+,b (d1v/znjccv +a$n_g$=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 surfa0r t .o6re+k5jsvm1oyce of a rectangular block of glass at an o tyjm+eo5s1kr r.v 60angle 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 aeh 1 o0w*r4ojf e6w.bkir into a piece of glass. Which one of the labeled arrows best indicates the path of the light ray after it enf06ek4.*wb e1o wjo hrters the glass?

  14.44: A ray of monochromatic light enters t+7svxvs6 iwkcs gx8b r9l.( (lhe right-triangular glass as shown. The glass has an index of refraction of 2.00 and it is surrosx (bl.ci lsr+w9v78xvgs6 (kunded by air. Which one of the lettered rays shows the path of the light after it exits the glass?