11.24: Two wave pulses travel to the right w2(db/uvbl 0-- ztc vu*c; vds toward a rigid boundary as shown. After reflection of the triangular pulsel u(cvwbv0db -/c-dtz s;* vu2, 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 shfht:5dzj2o l a:0)w m lbe);q+.plqpasses through the air and strikes the surface of a plastic block. Which pair of statements correctly describes the phase changes for the reflected wave and the transmitt;0l25aep:l) fzqh:o+swh d mql tb j.)ed wave?

  12.02: A ray of light passe zcjo:g6z*y: ds straight downward through the point labeled B in the diagram shown. The ray reaches a flat mirror placed at anog6 c:zdj*:yz 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 reflfz2rm imitu1s2f28iud 2rgw2dp/3;eection occurs whenever light is incident on

  05.18: A student hold a hand mirror to observe the back of hern t1/ex41f g4m2*.gwff bvah w head while standing in front of and looking into a wall mirror. If she is standing 4 ft in front of the wall mirror at .4vf w1wn2h1g*f/ ebm4 gxafnd 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 w cmf)gib/av51hen it enters a new material. Which one of the following choices is the term best ass)v/g fa1bmi c5ociated with this phenomenon?

  96.19: Light that has wavelength of 500 nm .;lf.3s 5 nkofttcs-min air has wavelength 400 nm in a transparent mk;ssft5l3t.m -nf c. oaterial. What is the index of refraction of the material?

  98.04: As sound travels from n ba)ihebs9 /2mnj :zg/f)c:isteel into air, both its speed and its:

  00.01: As a wave moves from one medium to a second medium withplsnyekxg1f am +,g s f7(381n a different index of refraction which of the following wave properties would xy ,1enssp(l+8n1gf g kfm73aNEVER change?

  05.47: A sound wave generated from a vg,gs q ( z;-qewvoz5:tuning 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 wavelength and frequency of the sound as s voz;q g egvw,-:(qz5it passes from air to rock?

  14.28: A waterproof speaker rgf/p5i;9j)r d9:nsj5wczzyplaced at the bottom of a swimming pool emits a sound wave that travels towfyngr 95z d:p/z5 jc)jsi9wr;ard 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 burstewnzjoq)0f pu )yr0zxe r,69, of white light strikes a rectangular glass block with an angle of incidencez0ur9 xp06eo)zwfyreq ),j,n 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)vz1f2v a(fmp 1.upt5rs4ayi point P on a boundary as shown to the right. Which segment best represents the refracted ray? ya2451arz).u( 1sf fvptpvim

  98.17: Which diagram best represents what happ/zr-i -awb85 dtg3fnt y2 wedv3 zuq5:ens to a ray of light entering air from water? Air is at the top in all diagrif- 5ewd8zaw53 /-brqu t :d2ntv zy3gams.

  94.11: The critical angle of a material(bz x9c n5,zwpg9lh )q is the angle of incidence for which the angle of refraction isbq9l(5zc xhz,)wgp 9n:

  95.12: The principle underlyi 0ju,bv:g ;zq,c2c iho1fz.nlng fiber optics is:

  98.36: The critical angle in a transparent substance suy7rtkde; 8s d9am94/iw pm,p vrrounded 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 of n tvryt+ .(ai4uuk- e2u= 1.5 to material Y with an index of refraction of n = 2.0. If the spee+ur -4kut2a(yve ti.ud of light in material Y is v, what is the speed of light in material X?

  03.15: A jeweler can distinguish betwee3k2bn*,e v rpc8oqzt5dk)lu 8js 8yc- n a diamond and a piece of glass by obserp8ny8oeckk8sz j r-t ,)qv3u5* bd2l cving the critical 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 i8y + xsd9pwq:knto a clear material. When the light makes an angle of d:+98kyw pqsx 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 is embedded in a material of index of refraction 2- j .qgr g:)uwpz, pdo2kyu. eyfq/(kn. The laser beam emerges from the materiak- r2uyku:pwo z/2qge. ,fj.p) gdq( yl and hits a target. See the accompanying figure for the position parameters of the laser and target. The value of n is:

  95.31: A beam of light pal71xuwor7,y kh h( n8jsses from medium 1 to medium 2 to medium 3 as shown in the accompanying figure. What is true about the respective in hlxn j,u kw8r7(yoh17dices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes fg z6)dqrar+ku (74 me;dkqts )rom medium 1 to medium 2 to medium 3 as shown in the diagram. What may be concluded about the three indexes of refractionsk+mkzr d6;(dagt)qe u7r)q4 , n1, n2 and n3?

  97.24: The accompanying diagram shows the path e5y6kbh )v* co*nqbd7 that a light ray takes passing through three transparent materials. The indices of refract5hqe *6y*ncbov7db)k ion 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 theab3)z ile7.kir5hz k9 path taken by a monochromatic light ray traveling through three mz) 3ki h7l9ibkaz. r5eedia.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 travelingf rm 399 ikmtlo7jkejg:l681m 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 incident on the surface of a rectangular block of glas :b0o+qvmzp )ts aqob)m tzvp 0+:t an 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 fgh9g lpn86 f+600nm is transmitted from air into a piece of glass. Which one of the labeled arrows best indicates the lp 6gnf 8h+gf9path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters the ri 1wf *ss,f0vpaght-triangular glass as shown. The glass has an index of refraction of 2.00 and it is surrounded by air. Which one ofavssp1fwf0 , * the lettered rays shows the path of the light after it exits the glass?