11.24: Two wave pulses travel to the rightcnb-k/fjk:k m6;5xea toward a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best represents the superpositicmn 5/fjkbkxa - ;k:6eon of the pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes through the air and strik3kz; r4z mpq0ges the surface of a plastic block. Which pair of statements correctly describes the phase changes for the reflectegr4q0;3 zmpz kd wave and the transmitted wave?

  12.02: A ray of light passes straight downwar(xj o; ff(whq7( jxor;d through the point labeled B in the diagram shown. The ray reaches a flat mirror fofx;xqhj( 7((wo rj; 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+ deowrdk+f.5u4v wx4y(tp3 nnju 2t, occurs whenever light is incident on

  05.18: A student hold a hand mirror to observe the b e2h7 y7 y)38dfwd;toj8a5 ygqxzi18 iur (nymack 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 the hand mirror 1 ft behind her head, she will see the back of her head how far behind tryj ueydnw ) 8(8t;gya o5 ix q7zm82y31d7ifhhe wall mirror?

  14.25: It is observed that a light ray changes d,rsgucq v e,qln,1 6zbz; 5c5cirection when it enters a new material. Which one of the following choices is the term z5 l ,,srv56 qcu;1ezqcg ,bncbest associated with this phenomenon?

  96.19: Light that has wavelc0n/q/t6 e atmength of 500 nm in air has wavelength 400 nm in a transparent material. What is the index of refraction oq t /nmt06/acef the material?

  98.04: As sound travels from steel into air, both its p 2+:)mnpng zyyx ff7,speed and its:

  00.01: As a wave moves from one medium to a second medium with a differentn(,7 s6)z*:rwtd os( djl usnu index of refraction which of the following wave propertiesdjnst :6wz) du(russ7,onl (* would NEVER change?

  05.47: A sound wave generated from a tuning fork of singlwnei*jd28u k 6e frequency travels from air (with speed of sound 340 m/s) into rock (with speed o8wdni*6e jk u2f 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 s7ws7)omt,n n* suq9in7r2 dqvwimming pool emits a sound wave that travels toward the surface of the water. In the water, the sound wave has a frequerntqd 2wu sn*,v9q7oin7 ms7)ncy $f_{water}$, 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 ligh)1nj ir5r ,pht t2x9wvt strikes a rectangular glass block with an angle of incitvit,rp 15 jw2) xrn9hdence 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 too-d(7j0 hcx,e puuz4oward a point P on a boundary as shown to the right. Which segment beso-c,(ouzj7 h xeu 4dp0t represents the refracted ray?

  98.17: Which diagram best ryeo2yu 7x0whwl zt:9n93e(x w epresents what happens to a ray of light entering air from water? Air is at the top in all diagram3 72(neuy:oxw t0 zeh w9wxyl9s.

  94.11: The critical angle of a material68lkr rc4yr9u9 w9 +5n m 1svkzh))8vzecyilo is the angle of incidence for which the angle of )561l +wcyirkn8croz49l ye)s 98r vzuv m9hkrefraction is:

  95.12: The principle un:dw lh0lh 1zly49yy eak0:s0iderlying fiber optics is:

  98.36: The critical angle in a transparent substance surrounded byhjr g jiumwva6+e-p.;iu a;;; 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 mat jk8ws542i0dwznjt 797 nfsmcerial X with an index of refraction of n = 1.5 to material Y with an index of refraction of n = 2.0. If the speed of light in materia4 ss2mcw fnz 9 5j7djn7tk8w0il Y is v, what is the speed of light in material X?

  03.15: A jeweler can distingui uulvw4q, h;xc e+l((psh between a diamond and a piece of glass by observing the critical angle of the light in each material. Glass with an index of refraction of 1.52 has a critical a(q4(u lu,wxcp ;e l+vhngle 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 cleagm;5p 1eu +5g0pgfybg r material. When the light makes an angle of incidence equg 5g10;egm 5+ppubyfg al 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 a0:t j) kea dn6izb/-aa material of index of refraction n. The laser beam emerges from the material and hits a target. See the accompanying figure for the pos-d/k e0jai tan)ba6:zition parameters of the laser and target. The value of n is:

  95.31: A beam of light passes p(8 r+a*sj 7lvicu.sn from medium 1 to medium 2 to medium 3 as shown in the accois 8 *jv7url+( apcn.smpanying figure. What is true about the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passeoyb bt bi8+kp:b x*:2gs from medium 1 to medium 2 to medium 3 as shown in the diagram. What may be concluded about the three index+ykp*: gbiot 2: bbxb8es of refraction, n1, n2 and n3?

  97.24: The accompanying diagram umjms5w34 1)ye1nqd yd eybrn( l5-4yshows the path that a light ray takes passing through thrye jd) e 431dqymy1(4 u5ynwnmsrb-5lee 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 below shows the path taken by a monochromat2(h1wfity is ;ic light ray traveling through thw1 2hs( if;iytree 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 q 38 t8jzrhybs4yv1/4 +oskbftraveling 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 rectangular block yvx e- lgers,1w5,mk * of glass at an r-w v1l*y, xmgk ,es5eangle 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 transmit4:cxz2; me6 lgpiz:m 1xhphj)wex) o0ted from air into a piece of glass. Which one of the labeled arrows best indp hmh;0 weog 4je:12p)xz)x6z :l icmxicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters thewy ci6unh /j; opg;h0i24t4gn right-triangular glass as shown. The glass has an index of refraction of 2.00 and it is surroun0i;hyn4ujw26g4p /tn g;oh i cded by air. Which one of the lettered rays shows the path of the light after it exits the glass?