11.24: Two wave pulses travel too;, b--uq4mt*wc ) hxmk psm8n the right toward a rigid boundary as shown. After reflection of the triangular pulse, the pulses 4km;p-) no8buc q*,-tmxhms wwill 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 surfaceba+ 9vdkixz 56 of a plastic block. Which pair of statements correctly describes the phase changes for t56db9 x+kizav he reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward through the poik ugg-aqcstvc),u(o , 5h;ui6 nt labeled B in the diagram shown oic uqgc- 6gv t(,huak5)s;,u. 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 nsl gg4 ox:0v0e3xd:llight is incident on

  05.18: A student hold a hand mirror tp4zk 6tgu0m zz/wb7v1o observe the back of her head while standing in front of and looking into a wall mirror. If she is standing 4 fmg 7p zw1u kz0tv/z64bt 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 ray changes direction wekonls-3zc dco*a3 i2yj+3) jhen it enters a new material. Which one of the following choices is +l* c3 jo3z)dnie sc3 ya2-jkothe term best associated with this phenomenon?

  96.19: Light that ha+wt.5ugwag ;rsx7,a rg8;szis wavelength of 500 nm in air has wavelength 400 nm in a transparent material. What is the index;w;wtuzi,5gggss8. + r xra7a of refraction of the material?

  98.04: As sound travel;u4bfm:0hvmk6i0cvp qh 4 ,g vs from steel into air, both its speed and its:

  00.01: As a wave moves from one medium to *zwtoy9..dabr3b qxziu8k1x 4yob; .a second medium with a different index of refraction which of the following wave properties would N.b8.3zxaw bx*k .4bq zody ;t9 1oryiuEVER change?

  05.47: A sound wave generated from a tuning fork of single frequency travel)w)pjsk q pg43s frogk) 4p )wjp3sqm 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 to rock?

  14.28: A waterproof speaker placed at the bottom of a swimming pool emits au4llq65h nr- bht/j,-x lr3f v sound wave that travels toward the surface ob j, hllh /53uxnl-4 t-frvr6qf 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 strikes a bd:x 6txld; lyjsu ,*(rectangular glass block with an angle of incidence u6d ;llj(:s,x*txbdyof $0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of light is direcn71; d fhks1lrted toward a point P on a boundary as shown to the right. Whic1dl7k nfhs; r1h segment best represents the refracted ray?

  98.17: Which diagram best represents what happens to a ri rs- 4/ai8vgyay of light entering air from water? Air is at the top in all diagramss 8 yigir-a/4v.

  94.11: The critical angle of a material ixsm i1s7ka 0pjvn1:v*s the angle of incidence for which the an1vsip7sa: v0m kx1 *jngle of refraction is:

  95.12: The principle underlying fibe, *st;ngzm 9 *wc9sbxjr optics is:

  98.36: The critical angle in a transparent substance surrounded by:6)6e olgsw2wo2 vuahf; fo4 x 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 au r0 dkeo rcw n,-c3mbxz26/2kn index of refraction of n = 1.5 to material Y with an index of refraction owc60n -e2dz3m/ kbuor k2crx,f n = 2.0. If the speed 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 piecrub(qp+1hpy -0zb6 l ie of glass by observing the critica(+p bir6h yb-0 lpqzu1l 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 clear material. When the /3j/pahcc 1ldlight makes an angle of inc/ jc/dcahp 3l1idence 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 laselufi c c:f(akn919nk4r is embedded in a material of index of refraction n. The laser beam emerges from the material and hits a target. See the accompanying figure for tnu 9ak1kffccl 4 i:(n9he position parameters of the laser and target. The value of n is:

  95.31: A beam of light passes from medium 1 to mxj6i2fnq l ygj7 1y)grz6 j5l(edium 2 to medium 3 as shown in the accompanying figure. What is true about the respective indices of refractiglyign5yx67 1rz6j( 2jlj f)qon (n1, n2, and n3)?

  00.14: A beam of light passes from medbl7/tnc cz z88,1gq ohium 1 to medium 2 to medium 3 as shown in the diagram. What may be conc n,7q/c8 hl tzobcz1g8luded about the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram showsalc/5l rd+ih72 nlyg5 x f8sj- the path that a light ray takes passing througsdy x-7/jn5+lch5la8l fr g 2ih 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?

  09.34: The diagram belj37po p 8d+k eac;oa7vow shows the path taken by a monochromatic light ray traveling through three media.The symbop8+7ko;oc ep7 ja vd3als $v_1$,$\lambda_1$ , 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 glass laoh 9iot bfflpxj61pyt *;cv59 9 laa nv+:04($n_g$=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 surf8y8wx if* w1xhace of a rectangular block of glass at an angl8hwxy 1*x 8ifwe 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 int,l2qoj8pdd+ e rec.s0xa(y r ,o a piece of glass. Whicc( r+l2odyr,j.peq,s0dx ea 8 h one of the labeled arrows best indicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters the right-triangular glassci 6qrz(xh-m (o.62mdhqjc d6 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 exm6qhmx- rci 6o(hdz2 (6d.q cjits the glass?