11.24: Two wave pulses travel to the 7ejsq-8phi f(right toward a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfh(i-j s7 8pqefere. 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 the surfacemn33vrpgtn35oz,b- j of a plastic blocnp bvr-t5mzj,n3g33o k. Which 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 qq6f o-,3o;nji- vci8 qyi 1typoint labeled B in the diagram shown. The ray reaches a flat mirror placed at an a oti 8i1 i jyn-c;fqq,ov-3qy6ngle $\Theta$ 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 is incvf(meok8 qtmr ssp300q*g .3nident on

  05.18: A student hold a hand mirror to observe the back -xf/ )ngwte1rm* z/tjof her head while standing in front of and looking -f gxmnje)1*trw//t z 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 direction *isrnc 7mpjo t9;e./y5x e(llwhen it enters a new material. Which one of the following choices is the term best a cx/(. l7njt;pr5sy9iem* e olssociated with this phenomenon?

  96.19: Light that has wavelength of 500ede; ql ddk5d5 ;iyw)4 nm in air has wavelength 400 nm in a transparent material. What is the index of rikdld e45eq ) y5;d;dwefraction of the material?

  98.04: As sound travels from steel into air, both its s4srf2mes8f/g5 mpo7 jpeed and its:

  00.01: As a wave moves from one mednga,jx(6rzs 82tit/8jf e2xnium to a second medium with a different index of refraction which of the following wave properties would NEVER change 2 fgsx/a28, jize(6rnjxn8tt?

  05.47: A sound wave generated from a tunin2 n/).b0 ljf+yljbt cpg 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 +2cpnbjyl /0fjb l)t.wavelength and frequency of the sound as it passes from air to rock?

  14.28: A waterproof speaker placed at the bottom of a swijy /hazh ( c d,acd,h1vh5up04mming pool emits a sound wave that travels uh,j 4d5hh1v( 0yh,paa/cdc z toward 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 whiteb(.*pm zr2 hks light strikes a rectangular glass block with an angsrb*k.2h pz(mle 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 directed toward a point P dahw.wf:q89 kk1mlr) on a boundary as shown to the right. Which segment best represents the refracted ray? .:m)rhafkww1d qkl 89

  98.17: Which diagram best represents what happens to a ray ofdrenv1r (vb */f674wrneq / 1hlgpc 0y light entering air from watw/ 7e hnre6l b* vvdngpr1fyq(0r4c1/er? Air is at the top in all diagrams.

  94.11: The critical angle of a material is the angle of incidencyrpbb4j8k *wp1b+7zx e for which the j+87x4b bkwzpyb*p 1 rangle of refraction is:

  95.12: The principle underlying /-gnon c tup79fiber optics is:

  98.36: The critical angle in a transparent substanq 8mr8ao tfrbi oxps;k)9, d45ce 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 ott)25 7mvduk1ln4ostf 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 light in material n1t5v)4dtlk 2uts7om X?

  03.15: A jeweler can distinguishsl-wp+ u:(/9 xt wweva 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 paxsw9v wt e-w:u(l+/ 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 light makes an ang;lbd./ p. jzkwbo8bo ,le of incidence .k ,op wbj.zdb8/ob;l 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 ind+nxxou34n5uj e7 -e-wt ji9li ex of refraction n. The laser beam emerges from the material and hits a target. See the accompanying figure for the position parameters of the laser and target. jtn-wi ne4 -ojl 7xi35u e9xu+The value of n is:

  95.31: A beam of light passes from medium 1 t46p j5 usk6 rf*esfgruc24 , 5srxn3xqo medium 2 to medium 3 as shown in the accompanying figure fqrj2k56prfr 54xssce64gu,ns3u x*. What is true about the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passe.2(o wws6 b kw9y-qwzes from medium 1 to medium 2 to medium 3 as shown in the diagram. What may be concluded about the three indexes of refraction, n1, n2 and wzsqw6(w o-w9 .e2bky n3?

  97.24: The accompanying diagram shows the path that a light rayz+;-zwas qd6eukb.4b y s4.b n 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 followingdsa s4; z +.ezqybk6nb4 -u.wb best describes the relation between the indices of refraction?

  09.34: The diagram below shows the path taken by 4ixz;-l kti3 kdu8g in :e/h-fa monochromatic light ray traveling through three media.The symbo3fethx;gi dn: u/- lizk-k84 ils $v_1$,$\lambda_1$ , 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 inl m;jl;+:uxt m 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 surfacsx:f o(6g(j wje of a rectangular block of glass at a (s:gjxwj6(ofn 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 600nm is transmitted from air into a piece of gwl7 h.b y)z2+c q2m4nxnx v:nvlass. Which one of them 2y)lwzbnvv7n: x h4nq.+ x2c labeled arrows best indicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters the r z.kex(*iam c2ight-triangular glass as shown. The glassae 2ckz*. (xmi 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?