11.24: Two wave pulses travel to the ri98+bmzjnf*t-cu /h e ;+oleh gght toward a rigid boundary as shown. After reflection of/c n8ohugfe+h l+-jb z9;em* t 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 coincide?

  08.30: A light beam passes through the air and strikes tna edyhs+7m 5-he surface of a plastic block. Which pair of stat 7+n5y-edsa mhements correctly describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light pas irb;ne*sp./stv +wo6k-qld5 7 rdfg(ses straight downward through the point labeled B in the diagram shown. The dp+v; .kld5wes6n i7s- b gqot/*fr(rray 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 refl052k3 sat9dk+n1a s o+wpuuj+p nrndqf0in4 )ection occurs whenever light is incident on

  05.18: A student holdw37vebb4ciz-66y duoc 4fd )d a hand mirror 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 wob6c7z-id4buc64fv d3y e)dthe 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 c4z;*g m3c owzg ( bzka01fwnc6hanges direction when it enters a new material. Which one of the following choices is the term best associatn(cowza k43 mwc; 0fgbz1* gz6ed with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavelength 400 nm in a (enz)cbol;i;0 cgj ;t 07mbr ctransparent material. What is the index of refracm )j0 nb;le(g z;b7co;ci 0trction of the material?

  98.04: As sound travels s3i3y.os i)9xif ov8 wfrom steel into air, both its speed and its:

  00.01: As a wave moves from one medium to a second medium with w cpp pffg gk)8:jvs1h7w3 +j99mzo 4ha different index of refractig mjk:3h4pcg91 jwsfo fw +z8pp v7)9hon which of the following wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of single frequ: f-yg216-enu ho8a r+xkvx vuency 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 and frequency of the sound as it passes from yfon+:1-x v-8kv6ahu gux2re air to rock?

  14.28: A waterproof speaker placed ad3r1f d(vf(n q;rqgp/ t the bottom of a swimming pool emits a sound wave that travels toward the surface of the wat qp(vqrn;(/f1rddg3 fer. 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 burstr olef e/0gmm5:/bm m9 of white light strikes a rectangular glass block with an angle of inc/rf 5gmm :9 eb0mloe/midence 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 1vbvlp .o*t lm (ary85on a boundary as shown to the righm5lby*l t vv1. (8raopt. Which segment best represents the refracted ray?

  98.17: Which diagram best represents 2+y nip 9fn t,s5n2i ,*awiv1ksb2 xcguve-b6what happens to a ray of light entering air from water? Air is at the toa192g 5vte-xispw 2u+cs,yb6fn *2n k in,ivbp in all diagrams.

  94.11: The critical angle of a material is the angle of inw2xto.ort.zl e. p c.1mjr/y4h9unki+ q3h; hcidence for which the angle of refrwx; u1zn qy.h/r9itko3mo.trpel 4c+j hh..2 action is:

  95.12: The principle underlybgg;o9gnt-ff+zr be e8jv*j0 i)ny 80ing fiber optics is:

  98.36: The critical angle in a transparent substance surrou40v6owr)7qbxe8 s ddunded 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 4 hanb:o :y)v*in+g, qvavny v32dfk5of refraction of n = 1.5 to material Y with an index of refraction of n = 2.0. If the speed of liq5,nhyk bnov) vaadf2v3:y+ivg: n *4 ght in material Y is v, what is the speed of light in material X?

  03.15: A jeweler can csp vq6obn jh-1,og;. distinguish between a diamond and a piece of glass by observingh ;gj1,sb.6vcoqop n- the critical 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 frh -1tl e -ve*vob3xmf/zm5ss;om air into a clear material. When the light makes an angle of incidence-sm3z xtf1*vvoles /-h5 b;e m 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 oi0nl-6 i:fw+ ;s 3mm*tuisn tlf index of refraction n. The laser beam emerges from the material and hits a target. See the; u n mw06tis*fltm- +il:si3n accompanying figure for the position parameters of the laser and target. The value of n is:

  95.31: A beam of light passes fro :rm9is:4vq nyzqs1 1rm medium 1 to medium 2 to medium 3 as shown in the accompanying figure. What is true about the respective indices of refraction (n1, n2, and n3m qr z:q149 :ns1rsivy)?

  00.14: A beam of light passes from medium 1 to medium 2 to medium 3 as shown in;;bg-gl4sa*7 epw+5qly hcy z the diagram. What may be concluded about the three indexes of refraction, n1,-b ;hls;gw7y* z4qcley +pa g5 n2 and n3?

  97.24: The accompanying dia42/h/y wwkzofk z,o.nwbt7n9gram shows the path that a light ray takes passing through three transparent materials. The indices of refraction in materials 1, 2, and 3 are n1, n2fwy29o4tkwz,hk/7n/ .w bnz o, and n3, respectively. Which of the following best describes the relation between the indices of refraction?

  09.34: The diagram below show hm; pmtypdjsw98:wckb/ , k,/s the path taken by a monochromatic light ray traveling t; p/ :,t,jm8/my9dskwwkc pbhhrough 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 jc1hsmy,u.u2traveling 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 surmg.yxgqx 5n 5u0 7km3tface of a rectangular block of glass at u057m q3x xng5gk.mtyan angle 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 trann nuz3v (7fw-k3k2m+ry a z*crj6+mngsmitted from air into a piece of glass. Which one of the labeled arrows best indicates the path ofn+k 63 jkwy v 7a*rcum+fz zn2g-nr(m3 the light ray after it enters the glass?

  14.44: A ray of monochromatic light;f07jhi 6xt 9 djy wn3a8p*p)9mlrsna enters the 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 8l0;7fwmsy 9)j9da*ha6pj3irxtnpn rays shows the path of the light after it exits the glass?