11.24: Two wave pulses tra(gj e 9c*7ywaufs88/qtytyb)vel to the right toward a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of thttw8*j(eqy8 f/a gy9bs7cu)y e 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 sd72)iv 7ll9ul9aacnw w f *jx5trikes the surface of a plastic block. Which pair of statements correctly describes the phase changes for thua)72n5vdfcj w9a7xl *w ill 9e reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward thro 2aktf z4/l4ktugh the point labeled B in t4 atklkz2t4/fhe diagram 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 reflectionh s604qxeo y fd.v7bg) occurs whenever light is incident on

  05.18: A student hold a han0kkkaz i xuldn6n* a332.3aia d 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 the hand mirror 1 ft behind her head, she will see the back of he23anilnda u k 3i.*603aakxzk r head how far behind the wall mirror?

  14.25: It is observed that a li/igj.zl9oiirws .pi;l+ i nz*w *o v5,ght ray changes direction when it enters a new material. r*soli.v/ *9p il; ,ign+ w. i5zojzwiWhich one of the following choices is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in ;2k ou41ed1or2jqorh air has wavelength 400 nm in a transpjqo1u14;kh2der o 2orarent material. What is the index of refraction of the material?

  98.04: As sound travels from steel intybk9 c2ic 6-sbo air, both its speed and its:

  00.01: As a wave moves from one medium zyrh *wdph -,fuz)qv )cv96w)to a second medium with a different index of refraction wh*dwpy u6 ,c)r-fqv)zv 9w)hzhich of the following wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of single frequency travels frbcx)d:b c5vz6yvscjba:g*ch.8t7m , q 0x/fy om air (with speed of sound 340 m/s) into rock (with speed of soun,bfj h.:xc8vxzcb)0bydymgsq c 6t/c *5a:v7d 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 poo9* zr3*y+cy nl g r1r1rzuzq.jl emits a sound wac+u 1*1.* nzl93grzr yyq jzrrve that travels toward 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 strikes a 9kv1l0c59 d kc c8exafrectangular glass block with an angle of inci 0dkc9v afce k59l18cxdence 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 towl;g3*y3/vb wiy2g lhhard a point P on a boundary as shown to the right. Which segment best representgb33hi /l*2y v;wlghys the refracted ray?

  98.17: Which diagrams.a;u q a )bccp6(hpv7 best represents what happens to a ray of light entering air from water? Air is at the top in a7pah a.)(;6uqcv sbc pll diagrams.

  94.11: The critical angle of a material is the angle of inm5a4xmdx/py 5)gv;m tcidence for which the angle of refraction ismx;5gtx )pd mm 4v/ya5:

  95.12: The principle underlying fiber optics sfrnem.fa5,8 d byh6( is:

  98.36: The critical angle in a transparent substance .k3ybl+nj(6 lrj-ilfsurrounded 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 frq1qcekk mk6* 0om material 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 material Y is v, what6kckm1* q0qek is the speed of light in material X?

  03.15: A jeweler can distinguish bc9v or ) aff;7-tg,fsretween a diamond and a piece of glass by observin- tfo)scffvr ,9 g;ar7g 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 from air into a clear material. When the lightkh pac(9pn9omg:ri3jm i*2t.,xi qf . makes an angle of incido* j.i (kxpicg ifmh mnrq2:9., 93aptence 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 index of refractionuz:3azalpt6 h2(2 dpj n. The laser beam emerges from the material and hits a target.:z(t lpa3u d6h2zpa2 j 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 mec(fmg 31)gta .k3hd dfdium 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 n3)?gkfcg3dth 3af. 1()md

  00.14: A beam of light passes from x38he f-sx dqc* 6n5rtmedium 1 to medium 2 to medium 3 as shown in the diagram. What may be e nh8x63cdqf-r*tx5sconcluded about the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray takes passin/yx h)bj1a q;bg through three transparent materials. The indices of refraction ihqjy;)/ b1 bxan 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 showo:-zsnfge/-:o ikg ;ys the path taken by a monochromatic light ray traveling throughike -z :-soof :g/gn;y 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 traveling in glasbzv/ukwti ,5h26r zw/s ($n_g$=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 rectanz+q5 *os azlg 9rv4ed5gular block of glass at l5*4esdz9or z v5+qgaan 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 transmitted from air into enj v;2 o+3jen a piece of glass. Which one of the label3o 2 j;enjve+ned arrows best indicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light en 5-yy)2 4nzbvgbae; zgya :(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 rays shows the path of the (4yn2 )ey ze;avy-:bz nbga 5glight after it exits the glass?