11.24: Two wave pulses travel to the right toward a rigid boundary as sh+ tm / rkbq6bh8t1*cxeown. After reflection of the triangular pulse, the pulses wikr xt1/ 8hcb6etm *qb+ll 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 surtv f (fj/22,b2vjfp eh0z; f/n aqa)xrface of a plastic block. Which pair of statements correctly describes the phase changes for the reflected wave and the traanfvtz f /02(2fhj;a v x/j2r),bqfe pnsmitted wave?

  12.02: A ray of lighk2o4 gwhnhvpz ,khjl1xz8(.s;p)7xa8 y yq 0k t passes straight downward through the point labeled B in the diagram shown. The ray reaches a flat mirror placed at an anglexpwv( )48. y joqk,82kl xnash7zy0 gp1zkh;h $\Theta$ 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 b9ocrcdj1cjj ,0)a n km3z rvdt -2u-ju.81sbincident on

  05.18: A student hold a hand mirrondf6m(*j ou wmv6g )y9r 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, she will see the back of her head how far beh f9uo( mygjd*n6v6)wmind the wall mirror?

  14.25: It is observed twhu/zhi*8 8,rg cx)nf+dyi . ghat a light ray changes direction when it enters a new material. Which one of the following choices is the teg wyxi*h+8)cf gdizr8./h ,nurm best associated with this phenomenon?

  96.19: Light that has wavel( z 9fqtn6(6vxjswcnm +,j7c length of 500 nm in air has wavelength 400 nm in a transparent material. What is the index of refraction ofw(tfnm ,n+ 6sjx7c(q6lzcj9v the material?

  98.04: As sound travels from steel into airft9ld 9xvwe/42/yt +f lpzs6v, both its speed and its:

  00.01: As a wave moves from one medium to a second medium witvxut8*mz,j 9(haz7z:nzqj,fc/)nzd h a different index of refraction whujztx ( ,vqzaz)h*z8 cd nfnm,z7 9/j:ich of the following wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of single frequency travels fro/wsoh-gbs5 x4rsvzcd*72 j f-m 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 it passes from air tocs*2/-z v gxw-sfd 5o7 brsj4h rock?

  14.28: A waterproof speakqwr)9f 9 ob0myer placed at the bottom of a swimming pool emits a sound wave that travels toward the suq 99f 0rwbm)yorface 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 burst of t(ig(ecb1dn,zx:/s ic -wi v. white light strikes a rectangular glass block with an angle of incidence of c,zni wi/1gev( bxtsd.c(-:i $0^0$. 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 jsfz:)x ax ycu. admf+:(y 8*otv o(/qpoint P on a boundary as shown to the right. Which segment/s :oodtc+ ux(.xz:a(vqy 8*j af)fym best represents the refracted ray?

  98.17: Which diagram best represents what happens to a ray of light enterin+9 vfxxvn.7o o6 mub2kg air fro7 x2 n96+okvvu.xm fobm water? Air is at the top in all diagrams.

  94.11: The critical angle of a material is the angle of c 7qr9i9l0ge/d xt0m b3jn5qn j +ovv1incidence for which the angn3dm0j +7r0 qvj xbn1 cqel5gvt9o9i/le of refraction is:

  95.12: The principle underlying fiber optics is:w ,ljj5li6cpc2 k4qm:vws6* g

  98.36: The critical angao*:f/ o1rtx dyp t+0 lca ms;(.wrt7fle in a transparent substance 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 indw vzt 40),y;udgu8gq dex of refraction of n = 1.5 to material Y with an index of refraction of n = 2.0. If the speed of light in materia uuzw ,yg)dv8g;qd04 tl Y is v, what is the speed of light in material X?

  03.15: A jeweler can distinguish-v2e.)l +zott y(kqal between a diamond and a piece of glass by observing the critical angle of the light in each material. G ela)lqv ok.(yt2+z-t lass 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 material. When the ligh aqxz- 7lt2qh zna50n4 )jyfe5t makes an angle of i 0n 5ztafyqex)h7q 4jla- n5z2ncidence 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 n. Trb9o d1i 2fl1k.s g3hche laser beam emerges from the material and hits a target. See the accompanying figure fc roglbi192hsfd1 3.k or the position parameters of the laser and target. The value of n is:

  95.31: A beam of light passes from ej6ttq3 o-i*kmedium 1 to medium 2 to medium 3 as shown in the accompanying figure. What is true about the respective indices of refractitqe6o i3tj *k-on (n1, n2, and n3)?

  00.14: A beam of light passes from medi 449conw.zwjq um 1 to medium 2 to medium 3 as shown in the diagram. What may be concluded about the three indexes of refraction, n1, n2 an zq4o.cj9 ww4nd n3?

  97.24: The accompanying diagram uf r7j.+zhnkac5 / os4shows the path that a light ray takes passing through three transparent materials. The indices of refraction in materiar7h5. ao4scukj+ nz f/ls 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 jt nii*z3x1j9qk2*tluo28 lz taken by a monochromatic light ray traveling through thre8t3z* l ti zil22qk9n1jju o*xe 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 traveling in u;y l)ron4m)5cjmzagt: aebf//m 2 o4glass ($n_g$=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 incidenf)s)1taqff tmmi+e), t on the surface of a rectangular block of glass at an anga)s+1 t,i)e mffq)ftmle 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 transmittezq r27a fop )c(-j h*tv/xwls4d from air into a piece of glass. Which one of the labeled arrows best indicates the path of the light ray after it enteroqv h )j2/l xw*z4s(rc-t paf7s the glass?

  14.44: A ray of monochromatic light enters the right-triangular glass as show.b ontayq86z:5fpy5:3rw1 vcn 0j dtxn. The glass has an index of refraction of 2.00 and it is surrounded by air. Which one of f6j xt:qa.tp1n05zybdr :yw 3vno 58cthe lettered rays shows the path of the light after it exits the glass?