11.24: Two wave pulses travel to the right toward a rigid boundary,w6b5m+xp mqm k;kds0uo-,n k 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 the centers of ;kw+s-m bn0k5q m6pmo,, kuxd the individual pulses coincide?

  08.30: A light beam passm;q a29mkky2 zes 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 transmitted wavakqzm9 ;m k22ye?

  12.02: A ray of light passes straight downward through th19bocw8umkr*/ to /u53s qjquvo5g j8e point labeled B in the diagram shown. The ray reaches a flat mirror plac /9ksj vqooq3jg5881u*c/ ou5 wutrbmed 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 incidentkd:c )h(f2yml( ui/fz on

  05.18: A student hold a hand mirror to observe the 9.sg9 tu(t) eb j /vz2ph5ywldicd-d4back 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, she will see the back of her head how far behind the wall mirrorh-)v z( 2p 54g/9dsbiw dlejt utyd.c9?

  14.25: It is observed that a light ray changes direction when it enters a dq5cjz ld 5y/f)2b1rxnew material. Which one of the following choices is the term best associated with tb1fz5qx5djl2r/ yd) chis phenomenon?

  96.19: Light that has wavelength of 500 nm id9t rn)yqj ,d1-m2nknn air has wavelength 400 nm in a transparent material. What is the index of rertnn,9m dy2 jndk1q) -fraction of the material?

  98.04: As sound travels frsd0ssxe*p( . eom steel into air, both its speed and its:

  00.01: As a wave moves from one medium hp 3x d8;vtt/i (aqmb9*z b;ydto a second medium with a different index of refraction which of tv*83(zt;b9h y qi txbddp;/amhe following wave properties would NEVER change?

  05.47: A sound wave generated fr58itax nhh 69jo7qu e /rq-dnfvp 525jom a tuning fork of single frequency travels from air (with speed of sound 340 m/s) into rock (with spn-5q 79fuo q5pj6h 8t/hdrixnveaj52eed of sound 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 placed at the bottom of a swimming pool emits hl;) o 5oq.tdrksufcrxn12(* a sound wave that travels toward the surface of the water. In the water, the sound wave hat2d1 ;nl*u( f5ork )q hxrc.oss 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 lighte8nw+wun wn :9 strikes a rectangular glass block with an angle of incidence : uw+e w8nwn9nof $0^0$. 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 f:e lnx( 8y7xjboundary as shown to the right. Which segmen f8yexnxlj(7:t best represents the refracted ray?

  98.17: Which diagram best n7wso+ -bbsq8j*p . iloj9j;crepresents what happens to a ray of light entering air from j-o9*jbo7+nwjs;l.p8 b sicq water? Air is at the top in all diagrams.

  94.11: The critical angle of a m9zxe8,u h z :p12aljxo p zt4ds8)ztf2aterial is the angle of incidence for which the angle of refrac,e29jpt2lz8s ho f zd pza8zxt:u)4x1 tion is:

  95.12: The principle underlying fiber optics h2gt/7 uw8 xv ssio34fis:

  98.36: The critical angle in a transparent substance surrounde:-t,cg* gaz2jvh hsj8 d 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 r5jjvk o;m)eu 1h x9kpcc19sidfz(31 = 1.5 to material Y with an index of refraction of n = 2.0. If the sp3ds1jxzfc;vurkh1k1p emij9o c5 ( 9)eed of light in material Y is v, what is the speed of light in material X?

  03.15: A jeweler can distinguis2 (nzw 0 tpdgqp3fvnifv(,b8(h between a diamond and a piece of glass by observing the critical angle of tig 0fb8( 2npvp(nz, tq(vw3fdhe 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 into a clear matemy4-ud f nuvt2nb9;sc18d;rd rial. When the light makes an angle of incidence equal vsd c 1f;bmn2-nd 9rd4t8;uyu 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:wl o2m ht1b2f m.zwe7 of refraction n. The laser beam emerges from the material and hits a target. See the accompanying figure for the position parameters of the 2mzebw1.th7ow 2 fml: laser and target. The value of n is:

  95.31: A beam of light ;yw18 jt3kw cdk: dks/passes from medium 1 to medium 2 to medium 3 as shown in the accompanying figure. What is true ak1dt:/cs8k dkwjw3y ;bout the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes fro1m(ph ,brt cs.m medium 1 to medium 2 to medium 3 as shown in the diagram. What may be conct.,b(csp 1rmhluded about the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray takes passing 4h rox)m- 3xuws6drekk(**n uthrough three transparent materials. The indices 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*6 wrk4oum k)r(hx- s ned*u3x?

  09.34: The diagram below shozd b mqqn2d824ws the path taken by a monochromatic light ray traveling thn48qdd bq2mz 2rough 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 ligh ri 2u-)s.vodf3m7mz tt traveling 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 eyp3ncm4.h)n of glass at n 4.ynmh)pce3an 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 600nm is transmitju e6hb l)a) qk:3yyqo(3x+ vgted from air into a piece of glass. Which one of the labeled arrows best indicub e)lhk qqgv3+o :yy3)jax(6ates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters the right-triangula1w q, tp6z-zg gr ylr+pu)9b,kr glass as shown. The ggz+1rb -wlg9tz yq6k pp),,urlass 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 light after it exits the glass?