11.24: Two wave pulses travel to the right toward ay,nq4 tq ct3rkt:80yn rigid boundary as shown. After reflecti r4ytttc y,30:qkqn8n on 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 individual pulses coincide?

  08.30: A light beam passes through the air and strikes the surface onlcj9m(sxblp 37 q)*t f a plastic block. Which pair of statements correctly describes the phase changes for the reflected wave anllcs j7xpb q9n)*(m3 td the transmitted wave?

  12.02: A ray of light passes straightwpovwd367.let fd 9-b downward through the point labeled B in the diagram shown. The ray reaches a 9v 3pwdbwe df t7l-.o6flat 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 occ t;:s yipz3px)urs whenever light is incident on

  05.18: A student hold kqz+ 7( sqne,da hand mirror to observe the back of her head while standing in frqn+,d zks7 q(eont 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 see the back of her head how far behind the wall mirror?

  14.25: It is observed that a light ray changes direction when it enters 5e6oh(s eu8n) sbbiqe.)c) gka new material. Which one of the fo g8 e koe.c)u()bs5inb6)eqhsllowing choices is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavelength 400 nm in aq1v0; m dhv9 pvpg rtu.6:vg.c transhmvvcr9.v 6gut0.qpv d: ;p g1parent material. What is the index of refraction of the material?

  98.04: As sound travels from steel n (s/stt xca3t2yr.6uzof35winto air, both its speed and its:

  00.01: As a wave moves from one medium to a second medium wwg0b w,ri0 3gjith a different index of refraction which of the following wave properties would b3i, g0gjr0ww NEVER change?

  05.47: A sound wave generated from a tuning fork of single frequencybzx9tz+s/ m9 m)5hioms kig /7 travels from air (with speed of sound 340 m/s) into rock (with speed of sound 1500 m/s). Which statement is zx 5t gsi+/)imbm9ohsm7 9z/ktrue about the wavelength and frequency of the sound as it passes from air to rock?

  14.28: A waterproof speaker placec7bs g k1rcr63d at the bottom of a swimming pool emits a sound wave that travels toward the surface of t16 rg kc3rbsc7he 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 block with 3 /z,av1j qr1( ;cpjbtgnmhe7 an angle of3bjcr,1v;m ehqt1 jagp7/(nz incidence of $0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of lig4 u:vs(0e zozwht is directed toward a point P on a boundary as shown to the right. Whicsv4eu 0z:o(w zh segment best represents the refracted ray?

  98.17: Which diagram best represents what happens to a ray ou; ae1t(yg+bp 1b.yr btv8iqo gl2*2 rf light entering air from water? po qy1a82i+by;lr ut2eg v .*(tbbgr1 Air is at the top in all diagrams.

  94.11: The critical angle of a material is the angle of i tntu4k-goq*zd3t )8sncidence for which the ttg8zq k4soud) n3-* tangle of refraction is:

  95.12: The principle r ep,zmnyqy85) w1p/t*sp a8.v m t,xiunderlying fiber optics is:

  98.36: The critical angle in a transparent substance surrounded by s:t 2 tc:ysa3qfz5dw9air 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 sz30voqtk e5*fraction of n = 1.5 to material Y with an index of refraction of n = 2.0. If the speed of lighskt53ez0o*vq t in material Y is v, what is the speed of light in material X?

  03.15: A jeweler can distinguish between a diamond an tw4,ybsd yue0/ov2 :xd a piece of glass by observing the critical angle of the light in eac2/ v,: uysodebt0x 4ywh 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 iye(q0 wf)sb.fj0 d1sv1hpkci9jkj ; 9nto a clear material. When the light makes an angle yj9jep9fb1hsvq1jcs0)ik 0 .w;f( dk of incidence 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 ixnl4ffk2a - 9 29qljghs embedded in a material of index of refraction n. The laser beam emerges from the material and hits a target. See the accompanying 4jah2l lf 2k9q9x gfn-figure for the position parameters of the laser and target. The value of n is:

  95.31: A beam of light passes from medium 1 to medium 2 to medium 3zhu*h /c4qv/zpr (-n v as shown in the accompanying figure. What is true abouv z-p/*/hc(h 4rvunzqt the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to medium 3 as shown in g x kw;,3w9o7jvhbxw1 the diagram. What may be concluded about the three indexes of rex 7oww1kv w9,3 bjhgx;fraction, n1, n2 and n3?

  97.24: The accompanying diagram sg/k um.a aj.)zhows the path that a light ray takes passing through three transparent materials. The in/ . a.)gajmzukdices 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?

  09.34: The diagram below shows the path taken by a monoch-lgzw1, mv dbt)t7*ifromatic light ray traveling through three media.The s* 1i-dg7t fvzt)bml,wymbols $v_1$,$\lambda_1$ , 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 tratoawn,.h+j 9* f- kh-ocjo u+aveling 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 sysue a/5 y+7ob i/af*incident on the surface of a rectangular block of glass at an a5ua bf*syi7 aso/ e+y/ngle 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 tra +(yneh eqtf8-x-h 9tinsmitted from air into a piece of glass. Which one of the labeled arrows best indicates the path of the light ray after it enters the gq- eh9t+yte f(ni8- hxlass?

  14.44: A ray of monochromatizyk06nd g+ dg) yd1n7ec light enters the right-triangular glass as shown. The glass has an index of refraction of 2.00 and it is +gz60dyden 1y dk)g7nsurrounded by air. Which one of the lettered rays shows the path of the light after it exits the glass?