11.24: Two wave pulses travel to the right toward a ribkp5toafrv ;*y 0 -hke1yof. 9gid boundary as shown. After reflection of the triangular pulse, the pulses will interfefa.;v k hooy*ktf5 peb-01r y9re. 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 passes through the air and strikes m5f5j jr)-z cpthe surface of a plastic block. Which pair o )- j5jcpz5rmff 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 labeled B ua8dejng e ; nb+n-,9nin the diagram shown. The ray renb-gn+;,9 aeuj d8 nneaches 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 reflection occurs whenever4xnf 3 8nx+pni light is incident on

  05.18: A student hold a hand mirror to observe the back of her head while sta7m; d06v5 qj.fz);lh x eldgg;js,rfanding 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 ms6.dde x;g70 lva; lhf,gj;jf5z)q rsee the back of her head how far behind the wall mirror?

  14.25: It is observed that 1bb d-:oua 3-igeux-3 jsfq f+a light ray changes direction when it enters a new material. Which one of the following choices is the term best associated with this phenom1bds+jf-3f - qbgu3-e u :ixoaenon?

  96.19: Light that has wavelength of 500 nm in air 0q l9fj j2de2oi7+w mphas wavelength 400 nm in a transparent material. What is the index of refraction of the matedpq72 f lij j2wmeo90+rial?

  98.04: As sound trav-9hnndtv./akrroj / 1els from steel into air, both its speed and its:

  00.01: As a wave moves from one medium to a second medium with a differlfwim; c4u. u7ent index of refraction .l wuc iu47mf;which of the following wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of single frequency travels fro;zcx 0yhqbuw,60f,alm air (with speed of sound 340 m/s) into rock (with speed of sound 1500fayz6xq0 ,; , huw0bcl 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 pool emits a so4x)sdb)n/lipiy uv4 gx02 5eound wave that travels towa2ius/gixov)4 epb5 dy0x 4)n lrd 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 whwt d)ugue07x 3- xcbn4ite light strikes a rectangular glass block with an anglteu30)wg 7 xudn-xbc4e of incidence 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 dire ,,sod*qvr,vu:7pr7 +zoaluq cted toward a point P on a boundary as shown to the right. uv7 :up,s7, aoz drrlvo,+*qqWhich segment best represents the refracted ray?

  98.17: Which diagram best represents what happens to sx n+ypp.6 r6)bgkn6 bd:7 zp:*xx ewda ray of light entering air from water? Air is at the top in all 6nx)kb6ded*x6 p: ys nwp.xb: r+g7zpdiagrams.

  94.11: The critical angle of a material is the angle of incidence fo5n h z5up)xi m:u/8phpr which the angle of refractio p5uppi:xu5m)h/8n zh n is:

  95.12: The principle underlying fiber optics-ls;wchtg ok rr f-lav6lymn/,+q10; is:

  98.36: The critical angle in a transpar452jjzs 5pbhtd0vglp o , d,*yent 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 refraction1)m ,mb:f6dfzs mg jc4 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 material Xz jbmdm) gsf,6c4:f1m?

  03.15: A jeweler can distinguish y)n f b b)hz x zku2:4j;pmm4r.p1ssm2between a diamond and a piece of glass by observing the critical angle)p;yz b:xjsmm.b f4 4n12pk2)urmz hs of the light 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 material. When the fxoot:fy ;ik9c:c 5xrg 0mk15light makes an angle of incidence equa9oxmk0:f5c5f rkgtc1x;: oi yl 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 refractiy sao)j /6vjj9on n. The laser beam emerges from the material and hits a target. See the accompanying figure for the position paramete)vj j69a yosj/rs of the laser and target. The value of n is:

  95.31: A beam of light passes from medium 1 to medium 2 to medi - pa ru1ulm,4ufful+6zuj9b;um 3 as shown in the accompanying figure. What is true about the respective indices of refraction (n1, n2, af;rua+1mzbl 9 ju4p uuf lu,6-nd n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to medium 3 ay(e,xr/d pzr-s shown in the diagram. What may be concluded about the three indexes of refractionzy-e (x d,rp/r, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that( i-tict-t i1md o+hwp),usz ) 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 the relation between the indices of refraction? -dc s pi m,t+ouzh)1-(ii) twt

  09.34: The diagram below shtwj zrq9t * gvo .k.t41nvga.2i0o7gsows the path taken by a monochromatic light ray travel *.1 nrvzgt70tta4o9.w .gk vijoq2gsing through three 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 travm5c+n czkne- ,eling 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 g7mmov7bz .imq4 .6oisurface of a rectangular block of glass at an ang.ii6g.o m bzomv7m q47le 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 transmitted03 ;0chc ixgwg e8ayk1ks;q/t from air into a piece of glass. Whiy c3g0hs k8 xi;gk0/1ea qc;twch one of the labeled arrows best indicates the path of the light ray after it enters the glass?

  14.44: A ray of mono/ 2zynn,a( 6x nt)pewcchromatic light enters the right-triangular glass as shown. The glass has an index of refraction of 2.00 and it is surrounded by air. Which one of the lettered rays shows n a)tx(/c26n,pyzen wthe path of the light after it exits the glass?