11.24: Two wave pulses travel to the right toward a rigid boundarl evv pyneu o18fkm*: p5(w:s,y as shown. After reflection of the triang,vsle:8vpye(n5 wf*:m p1u ko ular 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 the surface of a plajg.x;j otzc)1j mt)6 ystic block. Which pair of statements correctly describes the phase changes for the reflected1t ;zcx jo)jygt j)m6. wave and the transmitted wave?

  12.02: A ray of light passes straight downward th3p e03voveq,+l4oh nhrough the point labeled B in the diagram shown. The ray reaches a3qolhhpv ,o0+3v4 een 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 oct2sr9wb p 39 qxm:vr9 2pojbf/zd+zj3curs whenever light is incident on

  05.18: A student hold a hand miri ..yn;cq*51 fgsrjharor 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.c1;rsg ay5hn j.iqf* 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 ra7 ag0a zhqw -6h,v;ckmm8nx( ay changes direction when it enters a new material. Which one of the followin;w nam(aac 8 x,0h7q-mhgkzv6g choices is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavepjv 6kb- 1uzo8length 400 nm in a transparent material. What is the index of refraction of thbj8zk-v16 opue material?

  98.04: As sound travels fcisay 80bc) /)8bc lyirom steel into air, both its speed and its:

  00.01: As a wave moves from one medium to a second medi7n b v47xex-oxf8+ukmum with a different index of refr4b7evk- xn u+ox8x7 fmaction which of the following wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of senax1 -es /qpo9wa,x7ingle frequency travels from air (wie eqx1o /wasn9,xp7a- th 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 m z1dt,qqv// p1o8nj aspeaker placed at the bottom of a swimming pool emits a sound wave that travels toward the surface of the water. In the 1 /nz qa8/qvjdto1, pmwater, 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 z(fqc 8gtw: d;of white light strikes a rectangular glass block with an anglegt(qf8d: wz; c of incidence 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 on a boundazelrqcltecu+)z.m.v3s :;/ b ry as shown to the righs:bv;teru /zm.3.e +cc q)llz t. Which segment best represents the refracted ray?

  98.17: Which diagram best represents what happens to a ray of light entering air+ixt8usli -:g nh .i/d from water? Air is at the top hixnd+s:t-glu./ii8 in all diagrams.

  94.11: The critical angle of a material is the angle of incid1rw/z rr--wh yence for which the angle of refraction is: z/-r 1whyrr-w

  95.12: The principle underlying o o r2o41erl+i04td-9by)i m6 knfoknfiber optics is:

  98.36: The critical angle in a transparent substance sur* ultk1(vp/emf;qe5 -ppn xz +rounded 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 of o1p i : qvhy4;onje),4q:dhgvrefraction of n = 1.5 to material Y with an index of refra4j,)qv4doyoenh1hi g: p qv;: ction of 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 p/6y):e(mg vgqvlg;7 i2 j:6cfw yvm ptiece of glass by observing the critical angle of the light i ;yc:ggy(pj/v ql wv2i:)fet7mg 6v6 mn 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 matep171pyps6jyhf( pjtd si4 pbgo1u/ jn0 e :3/mrial. When the light makes an angle of incidence equal to:i4h u0 ( opsyjgj63p/j/dp n7pbym1fe1pt1 s $30.0^{\circ}$, 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 refr h1i9c,py of*, anmfa*o;us 9kaction n. The laser beam emerges from the material and hits a target. See the accompanying figure for t y*,;*,anmh99ofaip1 ukcof she position parameters of the laser and target. The value of n is:

  95.31: A beam of light pask33ht39wc j/v jtmq8lfy1)kzses from medium 1 to medium 2 to medium 3 as shown in the accompanying figure. What is true about tf q189lkwm3y3tzjv/)hc kj3 the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light pc4tyb5dy(.kd asses from medium 1 to medium 2 to medium 3 as shown in the diagram. What may be concluded about c.d(yyt5b kd4 the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray83j(tmxh;la0 et rh a/zz eqy(7t8 i34hnbxi4 takes passing through three transparent materials. The indices of refraction in materials 1, 2, and 3 at44(h(3re eqji8y 8/li ;azxh nt0mx ta 3z7hbre n1, n2, and n3, respectively. Which of the following best describes the relation between the indices of refraction?

  09.34: The diagram below upu (l+jzca cp)9- )ojshows the path taken by a monochromatic light ray traveling throughp j9uaczcpu-()j ) lo+ 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 h0jez(+j+2. fw b7imi7 o qixbtraveling 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 :sod b3d-1xcj-nlo r, on the surface of a rectangular block of glass at an angle oxs3jdn-1r ,c do:ob- lf $45^{\circ}$. 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 ij9)d:uu r.1cssuy)q 0rs )x mes transmitted from air into a piece of glass. Which one of the labelexms9uy dr)sue .us0 q)r: cj1)d 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 glassjm8f4 cwq 4b)n 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 exits thecq48) 4 fjmwbn glass?