11.24: Two wave pulses travel to the right qug:5(i) x javtoward 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 theju5)q v(: xagi centers of the individual pulses coincide?

  08.30: A light beam passes through the air and strikes the surface of a pls38uds tq08an astic block. Which pair of statements correctly describes the phase changes for the reflected wave and then 3adst8u sq08 transmitted wave?

  12.02: A ray of light passes straight downward through the point labw -)n 4a(ixj3 wbs0nckeled B in the diagram shown. The ray reaches a flat miw3nia 4w(-k0 nx)cbjsrror 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 whenever light is incident mh i5p i3wv4y5on

  05.18: A student hold a hand mirror tqs uqcc,w,: u8o observe the back of her head while standing in front of and looking into a wall mirror. If she is standing 4 :uw qquc s,8,cft 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 directic a32tyfd,vpo7za, z /on when it enters a new material. Which on3adyf c7,zpz/v ot,2ae of the following choices is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in a9 ,yf .sloez1d2h:re bir has wavelength 400 nm in a tran s1eb, y z2foh:lre9.dsparent material. What is the index of refraction of the material?

  98.04: As sound travm)pn /t ajy36pels from steel into air, both its speed and its:

  00.01: As a wave moves from one medium t+i:puqi qs336 nxzssev j ;g55r.io9eo a second medium with a different index of refraction which of the following wave properties would NEVER chang n q63rpj sise5zx9sv ; u+.i3q:eo5ige?

  05.47: A sound wave generated from a tuning fork of sc9eoc d53atgpewjtt )mrx6ot 4.-g81ingle frequency travels from air (with speed of sound 340 m/s) into rock (with speed of sound 1500 m/s). Which statemt crae.g4o5t3mo g9t)6c 1j-w 8tdexpent 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 xylj ce5-35r* /uf ,ll3b vhpox4y; aysound wave that l5oryabl-j;vx* lfy 5yuh,/43exc 3ptravels 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 wh3ge.zoda1 5k m99gq9ub 3 y -cjge7ajhite light strikes a rectangular glass block with an angle of incidence yahe gq a.19ck9mz33u7b5g-g ed9 o jjof $0^0$. 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 as8zbcax n 23bi0l1ioty:b 0i4s shown to the right. W20il41byx asb c o3t:0inbi8zhich segment best represents the refracted ray?

  98.17: Which diagram best representsx gm1hwgvz 7 ig83g- 8awh95sq what happens to a ray of light entering air from water? Air is at the top in all diagrag- 73gzhx1qgw g9 8a5wmvhi8s ms.

  94.11: The critical angle of a material is the angle of incidence for whl pg(4shu:mu0ich the angle of refraction g u(:h0 msl4puis:

  95.12: The principle underlying fiber op4pnkvpci7(fs3my ; r4tics is:

  98.36: The critical angle in a transparent substance surro6mg wihywd- o0;zx5-ounded 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 refraction ..ddm 5jji0.z smg* wkof n = 1.5 to material Y with an index of refraction of n = 2.0. If the speed of light in materials..kzw0j.ijm * dd5gm Y is v, what is the speed of light in material X?

  03.15: A jeweler can distinguish between a diamond and a piece m r2-ho ej+bk3of glass by observing the critical an32oj h ke-rbm+gle 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 intqlpx;htz6 k*4jt0e.u o a clear material. When the light makes an angle of h z4*6kptxj tu.lq;0 eincidence 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 j3hly5twwl*peht(i 1l,yo( 7 in a material of index of refraction n. The laser beam emerges from the material and hits a target. See the accompanying figure for the poyt h,l3j*((1op5hi ltly w w7esition parameters of the laser and target. The value of n is:

  95.31: A beam of light p;:d6k1d ;r-ls+bjhb95cm1 lhzy zn ksasses from medium 1 to medium 2 to medium 3 as shown in the accompanying figure. What is true about the respective indices of refrahyknr:cl h ;-ds lb6zjkm;d11 s +zb95ction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to ko*nik jd.-3wf (gm5qmedium 2 to medium 3 as shown in w o*(.qdmg3fk-kij5n the diagram. What may be concluded about the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a larygf;t q*7 v ec5x)n6 6w1vngight ray takes passing through three transparent materials. The indices of refraction in materials 1, 2, and 3 are n1, n r 6v5nxg t)vn176g eqf*awc;y2, and n3, respectively. Which of the following best describes the relation between the indices of refraction?

  09.34: The diagram below shows the path taken by a monochromatic light ray tra /eu9llo,(2sh- g u f7lqcnm(pveling through thr2( ofemll 7u lgnh, s/9pq-cu(ee 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 gla jbf rcb-y),v9ss ($n_g$=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 blcxd;/pog sy 3ny08hy +ock of glass at an angle of 3d+no yhy8gx;s y /pc0$45^{\circ}$. 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 transm bvjz fo9oyv n1g*wc f)4f.6s/itted from air into a piece of glass. Which one of the labeled arrows best indicates the pat 9yvszgf.fv6w41)f/bnoc *oj h of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters the right-triangular glasy,6q58n a4: 0h tptbqnhb1ybrz,hxr 3s as shown. The glass has an index of refraction of 2.00 and it is s,pbt hn,5bt yqayhr: 18x64rbh0 n z3qurrounded by air. Which one of the lettered rays shows the path of the light after it exits the glass?