11.24: Two wave pulses travel n : vv(v7t(b l7lvsm : ve-e69jy8hojfto the right toward a rigid boundary as shown. After reflection of the triangular pulse,6y8vmh:-v :lvbos t v7jj7ef(nv (9le 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 strig(tuqyb/-+/zgll4i k kes the surface of a plastic block. Which pair of statements correctly describes the phase changes for the reflected wave and the transmi/tu+-ly z(lq gbk4i/gtted wave?

  12.02: A ray of light passes straight downward through the point labeled B i.rl00js qzv*s n the diagram shown. The ray reaches a flat mirror placed at an angle0sql. svz0j*r $\Theta$ 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 igcb 1p;,2a vkkncident on

  05.18: A student hold a hand mirror to8(ss iqg3gkc u.t-8px 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 sheg8ssg x(qt3pk-ui8c . 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 -cqn7/storx;light ray changes direction when it enters a new material. Which one of the following choices is the term bor7q;s/-x cnt est associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air-vksqvz c *+sxr)vd/4 has wavelength 400 nm in a transparents k-/qvs4d+cz*xv) rv material. What is the index of refraction of the material?

  98.04: As sound trave x :i,.x8xmkmk;ruf 8zls from steel into air, both its speed and its:

  00.01: As a wave moves from one medium to a second mwmrlvw/ebzfa5i4g( cq.t336 edium with a different index of refraction which of the f .ww3b /fqiacez5 6 rt(4mv3lgollowing wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of sing+4vc q4p, lbt;r/kgwr le frequency travels from air (with speed of sound 340 m/s) into rock (with speed of sound 1500 m/twcrk,+prl /g4bv;4 qs). Which statement is true about the wavelength and frequency of the sound as it passes from air to rock?

  14.28: A waterproof speaker placed at9toh fhv17kfh*3 x- 3eyq+jun the bottom of a swimming pool emits a sound wave that travels toward the surface of the water. In the wath-xfoe3j9t *+f y3vqunk 1hh7 er, 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 bloy)d)(rb5 dl fq .lh*zick with an angle of incidence of *lq)5l.dd ry )h b(fiz$0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of light is directim6.)v .a5 bqqftk. j-cf 8fjced toward a point P on a boundary as shown to the right. Which segment best represents .cfqc-ibkq) 85j6.maj .fvtf the refracted ray?

  98.17: Which diagram best represents what happensjjgh20 62vfyyv clzxk0ai1rmu 74p, + to a ray of light entering air from water? 7 0h, 4p+1lyic6ry jzmva2vg20jfu xkAir is at the top in all diagrams.

  94.11: The critical angle of a material is the anglep wodarsf yexe0r:42u s1l:79 of incidence for which the angle of refraction is: s x udr9of:a 4s0re71e2y:pwl

  95.12: The principle underlyinzp zd erc)f+.8y-q 4kz7k3 pfxg fiber optics is:

  98.36: The critical angle in a transparent dj zzz a- 7shmna6;izk ;gjd8w+,wk:mc2y*4hsubstance 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 refraction a gnbv*v6kvn 0ib3b3* of n = 1.5 to material Y with an index of refraction of n = 2.0. If the speed of light in material Y is v, what isvvia3 n0 3kn bb*6*bvg the speed of light in material X?

  03.15: A jeweler can distinguish between a dvyu ;/,+lz,ff(ekkx, fiu i) siamond and a piece of glass by observing the critical angle of the light in each material. Glass with an index of refraction of 1iu ,fklk+; (vyi, /fxsuf,z) e.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 material.r*0 h6 anjil+z When the light makes an angle of incidence eq+j i rlaz0hn6*ual 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 mar6sl.ozwzd-*g2: c3a j rp 7hiterial of index of refraction n. The laser beam emerges from the material and hits a target. Sarg2hzip7sjcd -z36w:r*l. oee the accompanying 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 3 as sho ugj7u0t jn.g :1iev+f*6czrx wn in the accompanying figure. What is true about the respective indices of refrcx7.j1gjet:v6 +urg*n z 0 fuiaction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium26 sem ruv;2f3ve r8gp 2 to medium 3 as shown in the diagram. What may be concluded about the three indexes of refraction, n1, 26eugmr;vp e8v2sf3rn2 and n3?

  97.24: The accompanying diagram;d5gx +;lfo rhom/)q f shows the path that a light ray takes passing through three transparent materials. The indices of refraction in materials 1, 2, and 3 5;dm)xq /r;fo+ gflho are n1, n2, and n3, respectively. Which of the following best describes the relation between the indices of refraction?

  09.34: The diagram beihdk*bqvc/ k w,,oo +7low shows the path taken by a monochromatic light ray travelini wqk,docko , +7*bv/hg through 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 tri xv w958;x-covzsr6w7m:x fdaveling 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 rec3gb- sku 1bc4d,f7q4zo k5td ptangular block of glass aq,5tb f3 zod b7 s1pc4ukgd4k-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 600nmiz rp .*ig;63r s3am:.wfykrdbwjwm tx7+2 ) b is transmitted from air into a piece of glass. Which one of the labeled arrows best indicates the path of the light d mwir7 6:g*rj kp r;m32+3.)xf i zbsyw.watbray after it enters the glass?

  14.44: A ray of monochromatic light entejt w6 cjzt; rr7mk+z*59/2jk mka8jow- -yjghrs the right-triangular glass as shown. The glass has an index of refr +m z-8yjw5r j9o6 *j2 j ;k7gra/wjkkmth-ctzaction of 2.00 and it is surrounded by air. Which one of the lettered rays shows the path of the light after it exits the glass?