11.24: Two wave pulses travyklcksm61) 6* 8ps)jmshpv7/5otw vy ,nv+n pel 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 represents the superposition of the pulses when the centers of the individu)oh8lw6 v5ks)ynmnyj1 s /,vpp pm*6+ kctvs 7al pulses coincide?

  08.30: A light beam passes through ths goiq zd5,4w,e air and strikes the surface of a plastic block. Which pair of statements correctly describes the phase changes for the reflecqig5zd ,s 4wo,ted wave and the transmitted wave?

  12.02: A ray of light passes straight downw 5 pjf4biy/f/in5cwi0 ard through the point labeled B in the diagram shown. The ray reaches a flat mirror placed at aibcyij04i5/ nf /5fwpn 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 reflec (j vmiwf2q:i8tion occurs whenever light is incident on

  05.18: A student hold a hand mirror to obsk2ypuxmyv-:9 erve the back of her head while standing in front of and looking into a wall mirror. If she is standing 4 ft in frxy-vpm9:k y 2uont 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 direction whdbp5*;oz* 0*3ri ooaz-xy ahren it enters a new material. Which one of the following choices is the term best associated with this r*ra5;z i* 0 pbdyo-zax3*hoo phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavelength 400 nm 9 sgxk8.cl j+xin a transparent material. What is k js8g9xx .+lcthe index of refraction of the material?

  98.04: As sound travel. r5tf1xy)cgefwzd8)db-v7 v s from steel into air, both its speed and its:

  00.01: As a wave moves from one medium to a second medium with a different ii4o ;mk;nm s2eb8;ondndex of refraction;;;snedbok8 4mmi o2n which of the following wave properties would NEVER change?

  05.47: A sound wave generaeu tf95z-815 ud prlhkcfp80zted from a tuning fork of single frequency travels from air (with speed of sound 340 m/s) into rock (with speed of sound 1500 m/s). Which statement is true about the wavelength and freq5u fl-9f 5 8etu1hzz0pdrkpc8uency of the sound as it passes from air to rock?

  14.28: A waterproof speaker placed at the bottom of a swimming pool eme alu,9zgx ;gfm4g*n :its a sound wave that travels toward the surface of the*a 9f,m4; ugex ggzn:l 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 block2k u4,jt*8mqmzei1asgf xib8u33k1 da c 0(g o with an angle of incidence of tf4s,1iug (1iu xm8 0ocdkaj2*eqbmg 33akz 8 $0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of light is direaeje0++lkca 5 cted toward a point P on a boundary as shown to the right. Which sa j5e ck+a+e0legment best represents the refracted ray?

  98.17: Which diagram best represents what happens to a ray of libx/qy m47bf awc)b3w+ght entering air from w3y7b ac )w+/q 4xwmfbbater? Air is at the top in all diagrams.

  94.11: The critical angle of a material is the angle of incidence for which tho( gtpflf8)ur3c :d2h e angt : o duhr382fg()cpflle of refraction is:

  95.12: The principle underlying fiber optics is-tcd( nss)it ::

  98.36: The critical angle in a ,;o./e ao 3cwngn )bustransparent 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 re.f/(ptp b cghj32jgjz s),,jffraction of n = 1.5 to material Y with an index of refraction of n = 2.0. If the speed of tj. )g j,pb f/2jhgcs,(j3 zfplight in material Y is v, what is the speed of light in material X?

  03.15: A jeweler can distingu5 3 mssuvj5n5hish between a diamond and a piece of glass by observing the critical angle of the light in each material. Glass with an indemn shvj355 su5x 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 mat kpo qh,ga:;t3erial. When the light makes an angle of incitg k:hq;,3apo dence 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 ofp c:h*xx3gud2wg5 3e g refraction n. Thep:eg2cux gdg h w33*x5 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 of n is:

  95.31: A beam of light passes frjdxl vv8yi-7 (duz3u+ncibh .3 cs):man (1gbom 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, an jx( 8d7va l) chu3b iz:n+bd.1yncvu-(ms3igd n3)?

  00.14: A beam of light passes from medium 1 to mzf,l:gb)cn axu89 7y 8 9vgw 44fzzc *ditkqq*edium 2 to medium 3 as shown in the diagram. What may be concluded about the three indexes of refracti ckq lg*4z cnxwbvf uz*:8 7fi)g9,yd 9tqaz84on, n1, n2 and n3?

  97.24: The accompanying diagram shows the path towv: zj-wjk8ho 5 1.gchat a light ray takes passing through three transparent materials. The indices of refraction in materials 1, 2, and 3.v: zow1j 8hwgk -coj5 are n1, n2, and n3, respectively. Which of the following best describes the relation between the indices of refraction?

  09.34: The diagram below 8gaj6zl- kzbtw+qq 1,7q87.2rsf kxog ql i t(shows the path taken by a monochromatic light ray traveling through twikft(x qtz87-q qak o1lz s+jlr6 ,g b7.qg82hree 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 trave pugn2*gurf7 4ling 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 the surface of o63 6cawl x1yxycrie(qa *t76/m*cnv a rectangular block of glass at an angc*1 76i / acavx3rt6*no ym leqx6(wycle 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 piece of lq i +cbda7)1hglass. Which one of the labeled arrows best indicates the path of lh)q7bica+d1the light ray after it enters the glass?

  14.44: A ray of monochromatic light enth3xxvzw7q ;n4ers the right-triangular glass as shown. The glass has an index of refraction of 2.00 and it is surrounh;z4 qw73 xxvnded by air. Which one of the lettered rays shows the path of the light after it exits the glass?