11.24: Two wave pulses travel tu)bbahlsbe4 ty7;w4: o the right toward a rigid boundary as shown. After ;sbebw4 alu 7hty):4 breflection 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 coincide?

  08.30: A light beam passes through 0w)obd5 w,0vw45j+vii uhwjki:s l.tthe air and strikes the surface of a plastic block. Which pair of statements correctly describes the phase changes for the reflected 05i5wtv0b. ojwwljvws:,uhdik +4i) wave and the transmitted wave?

  12.02: A ray of light passes smovaq/w*z wc- q(f*:1yn/gbklu23wu+ j k ds0traight downward through the point labeled B in the diagram showv-kg *qs uu3(m nowlk*f w0jbc:1wq+/da/z2yn. 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 whene dvx;s;h4v9dt t((4 a vbgjs9tver light is incident on

  05.18: A student hold avj i59 9tiopy* 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 the hand mirror 1 ft behind her head*i599ti oypjv , 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 when it entersc kh7pz u 1 ;orjb1l,5oak5-lp a new material. Which one of the following choices is the t5 h5o,lakjrpupc ;ob1zk l71- erm best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in a3+ti wyzippb ,jo1:x0 eo kp8(ir has wavelength 400 nm in a transparent material. What is the index of refraction of the myewpkp3 p izbix(8+:o,otj01 aterial?

  98.04: As sound travels from steel into air, both i(xla9 ns og0(uc)f qt8ts speed and its:

  00.01: As a wave moves from one medium to a second medium o9g.6pi0 b00fwd l 8yt yi+cmcwith a different index of refraction which of the following wave propp8 ocdlb y9tmi00.+ 6yf wgic0erties would NEVER change?

  05.47: A sound wave generated from a tuninz7*;g8tdkl rey, hh; eg fork of single frequency 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 gd k;, ;7hhrte8ezly*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 a f62:/4jvsezs ivtiuk67niji + f/m* usound wave that travels toward the surface of the water. In kf/jtiveifj/+z*vu64i7 n usism :6 2the 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 ovl5:nr (54n ix6peijp f white light strikes a rectangular glass block with an angle of incidence ofix5elrpn j:i4(p5v6n $0^0$. 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 on a y+ntb k015l d3.14 udvg9 ,nhcslqo hiboundary as shown to the right. Wh h3+10kt,qsn1dh4ungbl v.l y9do5 icich segment best represents the refracted ray?

  98.17: Which diagram best 7xviwz.jhmyh2 o1;q,h:5 kta,sd 5fkrepresents what happens to a ray of light entering air from water? Air is a21v x;5hs.,k7yzfh io5hk jt:qwad ,mt the top in all diagrams.

  94.11: The critical angle of a material is the angle of incidshk,y iu)l 5)oence for which the angle of refractio,o))lh suki5 yn is:

  95.12: The principle underlying fiber opticsx r, xrryiq,t*);j9cg6x y de9 is:

  98.36: The critical angle in a transparent substance surrounded by air i6hn( hc4fzmferc2v)o:6o9uk ol9r q; s $30^{\circ}$. The speed of light in
the substance (in multiples of $10^8$ m/s) is most nearly

  01.28: Light travels from matervzmv /5-o2n.m)*z5 2i6knbfwtzknifial 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, what is tzw5 nm)6n*- .fbi2f t/vmi2 koknzz5vhe speed of light in material X?

  03.15: A jeweler can )lv3 n bv85vhs -v)oky x7i5qddistinguish between a diamond and a piece of glass by observing the critical angle of the light in each material. Glass with an index of refract)ovqvbyv 53x5ik )shd7-lv 8 nion 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. Whenob38 vq1x)bzek uirrs/e/3hw :nbg 36 the light makes an angle ofnorq1 xwg /ib6uv)z e3b3bs:8/hr ke 3 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 laser is embedded9igjt8wo msw k(p))/ b in a material of index of refraction n. The laser beam emerges from the material and hits a target. See the accompanying figure for the position parameters of the lasww8)ipmbjso9() tgk /er and target. The value of n is:

  95.31: A beam of light passg cp :mgl/ztqjhdyx6l )l*id e9(s3es .+z(, tes from medium 1 to medium 2 to medium 3 as shown in the accompanying figure. What is true about the respective indices of refraction (nm (y. s dq*z( lj6l+t,x:) l/hg3deicpes9gzt1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to medium 3 as shoz)zct4b06+r mjzhzogub 4 8i2nqi *;o wn in the diagram. What may be concluded about the three indexes of refraction, n1, n2 andbzh6 nzz oj*;+2)gut8zio cr0 i44bqm n3?

  97.24: The accompanying diagram shows thz6uo 3 +mlgl3v.t2 pzgyn) bf5e path that a light ray takes passing through thre+)v lblztzo53fgpm3 2n6ugy.e 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 monochromatic light ra3omap, l+zlr8 x; c* pwd6om8cy travelinm8cpm;,*a x3+l w ol6cdrp8zo g through 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 iw0sa.9s h x9rbz6.nvjn 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 r8y* vxylsx/ ,pectangular block of glass at an angyl8 ,pysxx/* vle 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 wavelen 8*2qsxswq h/huyi8 2pa-c7sggth 600nm is transmitted from air into a piece of glass. Which one of the labele-gwss2haqxy/c8h 7p *q2i8sud 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 glass ao2iq 75brd8(d0y uj nls shown. The glass has an index of refraction of 2.00 and it is surrounded by air. Which one of the lettered rayoyqrni872dlu5d j(b0s shows the path of the light after it exits the glass?