11.24: Two wave pulses travel to the right toward a rigid +v5 wza+,c ndx4cw*lcboundary 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 the individual pulses coinc lw+ vw,+c *d5cn4xczaide?

  08.30: A light beam passes through the air .sqg ,v5r5 wih9 pvho0vc/j5jand strikes the surface of a plastic block. Which pair of statements correctly describes the phase cha wviqsv0.5h, 5 c59hrpv ojjg/nges for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward through the point lan*3gai7s 6ge) tz/2h can0x()n k zcanbeled B in the dtns czag* 7zg/nan) 6a0nk 3 he(icx)2iagram shown. The ray reaches a flat 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 whenever light is incid e0qszout.yotx c4i g)2tg +j42rnn6+ent on

  05.18: A student hold a hand mirror to observe the back of her head while sta ,,mibbw*pro 6nding in front of and looking into a wall mirror. If she is standing 4 ft in front owbr p,oi*6m, bf 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 lighmd-xzd7g:m nb ks71,tt ray changes direction when it enters a new material. Which one of the following choices is the term best assocx m,ds z1nmt7bg:k d7-iated with this phenomenon?

  96.19: Light that has wavelas;ap p nugxe0p4 h(;8/g+mhg ength of 500 nm in air has wavelength 400 nm in a transparent material. What is the index of refraction of the ma+0gga 8phxs/h;an;e4(p gup m terial?

  98.04: As sound travels from steel into air, both its speed and itsk/ 9qfid g.ce):

  00.01: As a wave moves from one medium to a second medium with a different index2g/ syxi*lf d, of refraction which of the following wave properties/l igyd,2*sxf would NEVER change?

  05.47: A sound wave generated from a tuning fork of single frequency,jihd)t58w5j8o,ae.u fc 08 vncy p -)ifkyt v travels from air (with speed of sound 340 m/s) into rock (with speed of sound 1500 m/s). Which statement is true about the wavelength 5jiy0k)fe tacfp,w)5 un8d-.,v jy88tc o ihv 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 e( 2itvntl6/ -y(zqwh b.wo3gpmits a sound wave that travels towayhot.bq/pl3 tvg w62((zn-wi rd the surface 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 d vs0ydqn+:c8strikes a rectangular glass block with an ann+ q80sc:ydvdgle of incidence 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 ir;ni7 a1vgajjy w/-1toward a point P on a boundary as shown to the right. Which segment best represents t /gi -jajv;any117w irhe refracted ray?

  98.17: Which diagram best represents wyvr1, +hs- m,vkao(u7w sfl.tcub 4rf2g o4,h hat happens to a ray of light entering air from water? Air is at the top in aluyvw.4bf vcous hk+h,, (t4g21fsr-, la7 roml diagrams.

  94.11: The critical angle of a gpt8kr8; ; odbynih v2:qh 0wrpa7vqq6fo5/ 8material is the angle of incidence for which the angle of refractidi pfyq/n8:k b0g8;or8q;hthw5 vr7p a2 oqv6on is:

  95.12: The principle underlying fibmsdxmi4k,n 9s +w l5p*er optics is:

  98.36: The critical angle in a trans 8v8 /pc-ca ryfxgv)-nparent 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 7d dq,fw 1)rbn eb934w(wckp9cc (ervX with an index of refraction of n = 1.5 to material Y with an index of refraction of n = 2.0. If the speed ofkwv97e 9r(nc dbc)cb4r e3d, qpfw(1w light in material Y is v, what is the speed of light in material X?

  03.15: A jeweler can distinguish be4r/ *-*pvwij ts6r rxwtween a diamond and a piece of glass by observing the critical angle of the light in each material. Glass with an index of refxjwis*6r/wt- r *vp r4raction 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 c,zw un2( r:agklear material. When the light makes an angle wrak2u,(ng:z of incidence 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 la jh: sv8p+bjadd6m k10ser is embedded in a material of index of refraction n. The laser beam emerges from the material v kd0mja8: 6psdb+jh1 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 tzusj7v7iop0 n 8j/ /uto medium 2 to medium 3 as shown in the accompanying figure. What is true about the respec7s v0j/p7 t /zouunij8tive indices of refraction (n1, n2, and n3)?

  00.14: A beam of light pa7 icb/lyi7 z+(bd kh43pf4pyksses from medium 1 to medium 2 to medium 3 as shown in the diagram. What may be concluded about the th3i( kb7/pkc d hbyzyf+p744li ree indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a litg7 ylxy,m)3z9nb +wr ght ray takes passing through three transparent materials. The indices of refraction in materials 1r3b ), zytg+7x lym9wn, 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 rt ki:z.kn .u:say traveling through sz..n:ut ikk: 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 tra,eer:h e2mtp bd/98: br9 dzz8dmd3zfveling 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 q+ tua0d2r,dr 9c7bxkis incident on the surface of a rectangular block of glass at an aq0r d+ a7but,d9rk x2cngle 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 6008e/onov+ qim t+gn0uh;i8a:o0d9dtg)jjr d8 nm is transmitted from air into a piece of glass. Which one of the labeled arrows best indicates the path of the light ray after it ente)8o:;0rd+0hg8tn/8jiei tv+jo9 mondqug d a rs the glass?

  14.44: A ray of monochromatic light enters the right-triangular glk,k+ts cid0:q8cb 0fe ass 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 aftef0ike+dc:bt ,s8kcq 0r it exits the glass?