11.24: Two wave pulses t:3i1 uooiwtl )ravel to the right toward a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of uol 1w)ti3:oithe 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 surfa) hr;o7tzs: y viusu9nf0 +6q bw0ehj(ce of a plastic block. Which pair of statements correctly d 0n(b6 so :rhtq;s vyi+7fjz)eh0u 9wuescribes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light pasmjrwehyh383v q g t5,7ses straight downward through the point labeled B in the diagram shoj,w 5g vhr3y q3t7ehm8wn. 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 reflectionxu5e *8w9x xrw occurs whenever light is incident on

  05.18: A student hold a hand mirror to obs6a/9hx1bjc6 jkh lz.f5 j yta4erve the back of her head while standing in front of and looking into a wall4lj 9ctz65/ h a6ybjjh1ka.xf 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 when oc+*/7qx -c d8enpv.cx-hxrg9h cs1o it enters a new material. Which one of the following choices is the term best associated with this phenomenon? cc8-/o-r phxved* 19sqx.o 7n cxghc+

  96.19: Light that has wavelength of 500 nm in air has wavelength kk-0xrit zy915 jj.xa 400 nm in a transparent material. Wha5kr0zxj j9 k.yx1 iat-t is the index of refraction of the material?

  98.04: As sound travels from steel8j /u j(9w ,jj6 ypexqxb+vd-a into air, both its speed and its:

  00.01: As a wave moves from one medium to mcb/aihg+ / ,j(r3pcgw*( bg la second medium with a different index of refraction which of the following wave properties would NEVER change*i(g hl baw/ bc cj,g(+/3pgrm?

  05.47: A sound wave generated from a tuning fobw*9**sj 9 iqjc(zl cjrk 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 frequency of the sound as it* b*9zjjcj s9li*q wc( passes from air to rock?

  14.28: A waterproof speaker placed at the botk9 keavw8r8p+ tom of a swimming pool emits a sound wave that travels toward the surface of the water. In the water, the sound wave has a 9r kev8 pkaw8+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 li:s. r:xp;ulw9 skicfnau 59g+ght strikes a rectangular glass block with an angle of inc9sa+.u wufg ;ps5:cxlr:9nk iidence 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 on a boundary as s3fir0j+9mshkb v 5 wq(hown to the right. Which segmenq503 r+wikbs(v hjf 9mt best represents the refracted ray?

  98.17: Which diagram best represents what happens to a ray ofja899at2a *b8gh qh/p ixaw5u light entering air from water? Air is at the top in all diagramswh xb8aajh5ap*i ta9 9/82ugq.

  94.11: The critical g+isw-c+ ulx4 m )pz,aangle of a material is the angle of incidence for which the angle of refractis giam-wzlc,p4+ xu)+on is:

  95.12: The principley;y0v:ue n3 4zi jnrp6 underlying fiber optics is:

  98.36: The critical angle in a transparento+lpz zxp +a7y0q w:m+ 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 ref-u,.3y yaqnwpz- al3zraction of n = 1.5 to material Y with an index of refraction of n = 2.0. If the speed of light in my.wyza-3q nu -,a3pzl aterial Y is v, what is the speed of light in material X?

  03.15: A jeweler can distinguish between a diamond and a pieai.hp 59.xbwf3x /qihce of glass by observing the i 5 fh/ah.bx9xw3p.iqcritical angle 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 matf11rw-edtfe4 bnb0;.b1 bowo erial. When the light makes an angle of incidence equae bo11- f0wbbbfd1ero 4.;n twl 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 ref7*76kypbs zbtq9rsg 5raction 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. The value of nb s7kzp* 7gbtrq5 y69s is:

  95.31: A beam of light passes from medium 1 to medium 2 to medium 7qcm2 d (gh9k9j* qxno3 as shown in the9dockxq(hjgnq 7m *92 accompanying figure. What is true about the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light-alqz375 aoj b passes from medium 1 to medium 2 to medium 3 as shown in the diagram. What may be concluded about the three indexes of refraj- zqoa7l5 ab3ction, n1, n2 and n3?

  97.24: The accompanying diagram shod i*5eai). xf 3fxqoosw/ f *5-2twevjws the path that 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 indiifx d*wje i*/3sev2fof ax)-5tq5.owces of refraction?

  09.34: The diagram below shows the path taken by a monochromatic light ray tra (azwqh-fd fs8 8ma,;pveling thro- f w,fz8hdq;apma (8sugh 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 traveling inmci-31xs zhv) 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 a rectangular block of ur,h o0yy4 fc1glass at 1 yr0,4 yhcufoan 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 transmitys h5x2s 9o)ty02oj .qqipv i,ted from air into a piece of glass. Which one of the labeled arrows best iso ys) 0i5vt2,yiohj q p2x.9qndicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters ( .- ,k 9,xrwnwxpfkn+q2u jlbthe right-triangular glass as shown. The glass has an index of refraction of 2.j9qlxbw ,k,nx f.-(+nk2 ur wp00 and it is surrounded by air. Which one of the lettered rays shows the path of the light after it exits the glass?