11.24: Two wave pulses travel to the right toward a rigid boundaryvq4 by q4zil.( as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures byil4zq(qv.4 best represents the superposition of the pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes through thtt 7je eb mk4qh2:9ok/e air and strikes the surface of a plastic block. Which pair of statements correctly describes the phase changes for the reflected wave and the transm7e:b k tj ko4q2/thme9itted wave?

  12.02: A ray of light passes straight downward through the point lab)o /ax:talnt1 eled B in the diagram shotn)a/ olxa:1t wn. 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 reflection otlfm)3k 5/84zfszc k occurs whenever light is incident on

  05.18: A student hold zk b5 ;p mepqw(x9,n3/z63n ypg(vits a hand mirror to observe the back of her head while standing 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, she3kme b/,wpv;sypizn5n(tzq(p x 6g9 3 will see the back of her head how far behind the wall mirror?

  14.25: It is observed that a light ray changes dirc1kg: hn8gvfq aax o16)wi9k6e )xz+jection when it enters a new material. Which one ovo x 8xk:fge qjw kaz)nic6h+161 )9agf the following choices is the term best associated with this phenomenon?

  96.19: Light that hasw hdn3s+y3lsw k1s, 6c wavelength of 500 nm in air has wavelength 400 nm in a transparent material. What is the index of re,n s3hk wcl361ws+ysd fraction of the material?

  98.04: As sound travels from steel into air, both its speed5a7fzdu9obl.0pg ami3r5m;ec x t72e and its:

  00.01: As a wave moves from one medium to a second medig7 a;i -jqb.tady-(qc um with a different index of refraction whia y;jq 7i--(cqdgbt .ach of the following wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of sinm tk8ejoe; rl4(stwiq,c j61-gle frequency travels from air (with speed of sound 340 m/s) into rock (with speed of soun1mtcw-(s io,; 4kjee8 6ljrqt d 1500 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 placedy( wgh1m8vfd5b 7gy 9a at the bottom of a swimming pool emits a sound wave that travels toward the surface of the water. In th h gwbym7d5a f8gy(v91e 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 strej-19xbmu b8hg wt3w ,f chvu:9ne3 s.ikes a rectangular glass block with an angle of incide3g9h1ebu j s-mh9,f.u:x3c8bwvnw t ence 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 bolm -fm9 2rva 17ebubq:undary as shown to the right. Whi7fqml2b 9 earum1b:v- ch segment best represents the refracted ray?

  98.17: Which diagram best represents what happensozh14*2tp hxl to a ray of light entering air from water? Air is at the top izotxlp1h*2 4hn all diagrams.

  94.11: The critical angle of a material is the angle of injwy:2tu qa)-/ p+uo eycidence for which the angle o/ q aoe2 yu)tjypw:u+-f refraction is:

  95.12: The principle underlying8jbi /sc mrl rwcm, 1os2-6k2/d)nibu fiber optics is:

  98.36: The critical angle in a transparent substance surroundey8rjd 2/8i(1/gness qw 4cud fd 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 ofsaom0 (t v/m z yeo9;9o/3purs refraction of n = 1.5 to material Y with an index o o/ ymetzo ;or9a3(ms vu9/sp0f refraction of n = 2.0. If the speed of light in material Y is v, what is the speed of light in material X?

  03.15: A jeweler can-kxw3qh +-j cl distinguish between a diamond and a piece of glass by observing the critical angle of the light in each material. Glass with an index of refhlwk+qj3-cx- raction 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 cleao s5whfxj5 dx( 9sx g2epp9-u;r material. When the light makes an angle of incidence e;ox h( 9 9 xuf55s2gxejwppds-qual 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 emb4u)j 1jws5ilj edded 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 powi4jjj1 us)l5 sition parameters of the laser and target. The value of n is:

  95.31: A beam of light passes rj6y (cn.88fcw7rossfrom medium 1 to medium 2 to medium 3 as shown in the accompanying figure. What is trc s.6yfrwojnr(s 8c87ue about the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to mh.,7cvu zpxo o tau-5l;7ci4bedium 2 to medium 3 as shown in the diagram. What may be concluded about the tica lcp4 uxtob5 zuv7; h7o.,-hree indexes of refraction, n1, n2 and n3?

  97.24: The accompany5lb5d .nbtio4 ing diagram shows 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 n34 loi5bd.5bnt , respectively. Which of the following best describes the relation between the indices of refraction?

  09.34: The diagram below shows the ;)s 1to24 n5hiah6hs qoa-fm; l8ehtppath taken by a monochromatic light ray traveling through three media.The s8lhts; e) tihpoa;hnasfm1 -6oh5 42 qymbols $v_1$,$\lambda_1$ , 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 glass (lm1+g*tkel w: u2oje x3. y*mo$n_g$=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 incidenta ll 8bihk:(*p on the surface of a rectangular block of glass at an a*(k:hpb i al8lngle 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 600e0lm)yt0) fx* f-xkfsovc)pr6 n 1 vb/nm is transmitted from air into a piece of glass. Which one of the labeled arrows best indicates the p st 10 e c)rfmp0xl)b*fyn/fov 6-xv)kath of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters the right-trianw/h,yj y,9y obgular 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 the path of the b/y, jwoy ,hy9light after it exits the glass?