11.24: Two wave pulses travel to tf xfvbd:e6iim0 y25s9a+i mh4he right toward a rigid boundary as shown. After reflection of the triangular pu9 mas+v:id5he0iyxmfi fb 4 26lse, 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 strikes the shaxyr8q+e 01j9qo)p gof6d ( yurface of a plastic bly a0r(9e 6q+qdh)fojx g 18yopock. Which pair of statements correctly describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of lighut*;t.2x rzy c d8(w0m6lqejkt passes straight downward through the point labeled B in the diagram shown. The ray reaches a flatld* we6mtz 20y jucx(tr8;q.k 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 occurs wheyhqsm3ts9 3 htv9 )v6bnever light is incident on

  05.18: A student hold a hand mirror to observe the back of her head whil( xoaj,djwp; 3e 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 ftj (p;ojwda 3,x behind her head, she will see the back of her head how far behind the wall mirror?

  14.25: It is observed that a lighyi vq*y9xwmcn) 54 7;ukau(im t ray changes direction when it enters a new material. Which one of the following choices is the termiv 754ym)a w9*i ;yxncuq(kmu best associated with this phenomenon?

  96.19: Light that has wavelength p 1i-d-+3zygb 9gx6wavjoy l;of 500 nm in air has wavelength 400 nm in a transparent material. What is the index of refrxdv ;g+iya pyb9wz-o36gl1 -jaction of the material?

  98.04: As sound travels from steel into air, both its spo74)rfg oe0f xeed and its:

  00.01: As a wave moves from one medium to a second medium with a different index+ ::bh jeu3tkv of refraction which of the following wave pr+ub: kjhv 3e:toperties would NEVER change?

  05.47: A sound wave generafjo:11qs:7 rwc8 pvqqted from a tuning fork of single frequency travels from air (with speed of sound v1w:qo8qr1qc 7spj : f340 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 to rock?

  14.28: A waterproof speaker place7,d u fwgi*78bgu-muqd at the bottom of a swimming pool emits a sound wave that travels toward the surface8,gi7m ud*u7-bfugw q 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 white light strijilag-+0 bpj54wg ,cfkes a rectangular glass block with an angle of incb4 cg,jia jplfw0+g-5 idence 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 z uv22- bfjomw6z80 trboundary as shown to the right. Which segment best represents the refractez2ou2 mf r w6j0tz8b-vd ray?

  98.17: Which diagram best represents what happens to a ragsi6xbs0:l 1bsc ,*bay of light entering air from water? Air is at the top in all diagrams.: sbsx1*0bgsai, l bc6

  94.11: The critical angle of a material is the angle of inc33j0ub .xhnmh-q: tzcidence for which the anj nzuqc0hx:-m hb.33tgle of refraction is:

  95.12: The principle underi / vocu.c)v r-j9s+dzlying fiber optics is:

  98.36: The critical angle in a transparent subst/ j8ms x xnkapl+j-j-9ance 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 refractionzy.tqkofcga) gbd5 ,y *:,p(u)bixq5 of n = 1.5 to material Y with an index of refraction of n = 2.0. If the speed of light in material p cg ka5,bb)fuo zdtxgy q5*(q)y,.:iY is v, what is the speed of light in material X?

  03.15: A jeweler can distinguish between a diamond and a -5,ye y+suxyq u*a1wj piece of glass by observing the crieasywxu 5*+1 u-q ,yjytical 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 into a cxpb 0icw ikj4: )k;r3;y*soxi lear material. When the light makes an angle of incidence equal t0):j x*r4 xkiiio;skpby;3w co $30.0^{\circ}$, 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 fcj()s0v1 qb(gnnzdfz.uvsu *, r-,v. The laser beam emerges from the material and hits a target. See the accompanying figure for the position parameters of the laser andbszunvd0 vu. ,,cgqz()frv-1f s (nj* target. The value of n is:

  95.31: A beam of light passes from medium 1 to medium 2 to medium40p(o- vg .h/hu oa1lcmixw b; 3 as shown in the accompanying figure. What is true about the respective indices of rh;4-/ ahm(.o0 c pxub1w glvoiefraction (n1, n2, and n3)?

  00.14: A beam of light a,hf8vclg* j1 passes from medium 1 to medium 2 to medium 3 as shown in the diagram. What may be concluded about the three indexes of refract*f1lchg8a , jvion, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray takes paw ldp;q8ems3syexn*+ zy) 54 qssing through 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? dmw5x )zpye8 y 3*ns;qe+4 qls

  09.34: The diagram below shows the path to:gb 7q8a*pe .pq2rmv aken by a monochromatic light ray traveling through three media.T2vpqa rme q p*og78:b.he 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 travel(b5ivez1 uf lc/h.v3ding 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 recws ynpoa(v7jr m85363r impp7 0bq.iotangular block of glass at an awip(n3 p3 p6ojbyaq7.om0 87 risvrm 5ngle 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 transmitted from air into a piece of glass.wk .z xl-u 2z ;hl+l:b.8dvekv Which one of the labeleuz- ;x2 zd l8.kvwhllebv :+k.d arrows best indicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters thjm1b l+usic*/z;t4kre right-triangular 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 light after it ex4l;j*tkis /1zmur+bc its the glass?