11.24: Two wave pulses travel to the right toward a rigid bxp)fnux 5akxr:f( 8j4oundary as shown. After reflection of the triangular pulse, the pulses winxu)( 5frxkpx:8a4j fll 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 the85 cxr:ti, akw surface of a plastic blt:wx 5c,aik8rock. Which pair of statements correctly describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward through thxz-py;jniu;d2pb.j ez m +c 6:e point labeled B in the diagram shown. The ray reaches a flat mirror placed bi ;pcd+ 6ymez-j. ;p:j2xunz 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 reflectionlany) 1ije4 43sbt:l ,fsak6 j occurs whenever light is incident on

  05.18: A student hold a hand mirror to observe the back of her he4)kl tb 3fw4k cf5l v:7j+brzjad while standing in front of and looking into a wall mvklcfl 4j7b jtr4)z f3bw5+k :irror. 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 mirror?

  14.25: It is observed that a light rayulne 4xo)jsf6(du5+cit w87c changes direction when it enters a new material. Which one of the following choices is the term best associated witdsil 4+c(wt6o j7e) fuu58cxnh this phenomenon?

  96.19: Light that hab vkw ( 0mbjfxjj+.l2+s wavelength of 500 nm in air has wavelength 400 nm in a transparent materivfj.w +jj(b0m2x+l b kal. What is the index of refraction of the material?

  98.04: As sound travfr tk+ezd/ ogo0ntw0.y2q n ++els from steel into air, both its speed and its:

  00.01: As a wave moves from one me 5p7nx2i0q,4pz bvk9cl 8ywicdium to a second medium with a different index of refraction which v9,i0 2kbycxpc n8l5zwipq 74of the following wave properties would NEVER change?

  05.47: A sound wave generated- :f(j(g7 r+remnucou from a tuning fork of single frequency travels from air (with speed of sound 340 m/s) into rock (w:rm nug(e7 j(-ocu+frith 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 speak h+wjedat8e +.a-jp le.*o4 gzer placed at the bottom of a swimming pool emits a sound wave that travels toward the surface of the water. In the water, the sound wave has a frequency * d+a.aehjtp4. l ow-g+8eejz$f_{water}$, 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 strj3dep( kdu/piocs-: d; (iv s8ikes a rectangular glass block with an angle of incidence of sve3 p(di(id8dsk oj-u/p: c ;$0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of light is direc+rjw jz ry 02v(i, ykc74fu2ilted toward a point P on a boundary as shown to the right. Which segment best reprerky2v2+7 lrzwifu, 4y(0 jjicsents the refracted ray?

  98.17: Which diagram best represents what happens,uqf wree4ck* 3)4o xv to a ray of light entering air from water? Air uqe)r4wf4ev*3kxc ,o is at the top in all diagrams.

  94.11: The critical angle of a material is the angle of inciden,;-:gss.w fvfcm7 alxce for which the angle of ref.fxg afsmw,-:v 7 lcs;raction is:

  95.12: The principle undp/j2q/ dnh.n;w7oc5q ist h*g erlying fiber optics is:

  98.36: The critical angle in a transparent substance surrounded by aw0:lhz: rqwis6sud6 4 3ho f3tir 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 refwbigfv : x riji,(y( x:))g0.ure l+leraction of n = 1.5 to material Y with an index of refraction of n = 2.0. If the spexlrfe) (,)i:+ gul 0exg:yiv j.bir (wed of light in material Y is v, what is the speed of light in material X?

  03.15: A jeweler can distinguish between a diamond and a piece of glass by 6ai+ 89 pxlsh*k)xhcr observing the critical angle of the light in each material. Glash)69 pcsa8xx il+*krhs 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 air9zy vu2ma0 lq4*lsrc8 into a clear material. When the light makes an angle of incidez2sm0u8aqvyc rl9 *l4nce 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 i. :e ebtly:de:ndex of refraction n. The laser beam emerges from the material .eld :t be:ye: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 passes from medium 1 to medium 2 r23 owzeuh9typh2+cop/ 9) koto medium 3 as shown in the accompanying figure. What is true about the respective indices ohwrc3+o/ k9ot 29uozp)peyh 2f refraction (n1, n2, and n3)?

  00.14: A beam of light oknm2snr+ t g4*a763stz gyh4 passes from medium 1 to medium 2 to medium 3 as shown in the diagram. What may be concluded about the three indexes of refraction, n1, n2 and*3no2 t6agtsz 74 gkyr+4hnsm n3?

  97.24: The accompanying dq jli4cy ek 86lr).lk8:ay ne9iagram shows the path that a light ray takes passing through three ee86cy.n:)la4i ylq jr9 klk8transparent 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?

  09.34: The diagram below shows the path taken by a monochromatic light ray rcit3lr+ /b28ljta9 wqda b6* traveling through three 2taq6b l/rw3jc ta*8d + 9rlbimedia.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;owq (ki s)eql6e1* nit 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 recgkrw2q(+dpk0 uus)h.0r ;3 mgby .togtangular block of glass at an an.30g ps;m+uoy2gw 0dt gr).rqh k(bukgle 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 transmitl7 dddbp.-yq,fux+a22+v v e jted from air into a piece of glass. Which one of the labeled arrows best indicates -v j 7fd a2+p x,v.y2dlqdeu+b the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters the right-tria 96ogk8 7bgeeu6c n5bpngular 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 of9p go8nbu6 be6 cgk75e the light after it exits the glass?