11.24: Two wave pulses travel to the right to,*) bk8qrmvga 0nlh y*ward a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following picturevhga*8)q, m b*r0lkny s 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 ywxu3t7c*jp0(/ )*ztc ixb rlsurface of a plastic block. Which pair of wb*rj7tyc() pz/ ix*tu3x0clstatements correctly describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight dowudoys3-28ad d nward through the point labeled B in the diagram shown. The ray reaches a flat mirror placed at ansdu8y 3d-2aod 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 whenever light is incide,ez h54e1sij 8;rmbp bnt on

  05.18: A student hold a hand mirror to observe the back of lr ybm .m1n.9/c+7olhbnhptiup /9a;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 ybpl l/ba 9 o97hmch;.t1.pn i+r/mnu 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 changes directioz8fc(2 l 0-u.ufjxgwn n when it enters a new materia jw20 uu -fxf.n(8lzcgl. Which one of the following choices is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavelength 400,a+ a +*gzffot nm in a transparent material. What is the index of refraction g fo+f*ta,a+zof the material?

  98.04: As sound travels from steel into air, botylfi q1 yf1/gwsgx-a- lh/; s0h its speed and its:

  00.01: As a wave moves from one medium to a second mediur4dym.ij +7nj m with a different index of refraction which of the following wave properties woy 7 4jnid+m.rjuld NEVER change?

  05.47: A sound wave genexa.adx) h:wnl 2b a4dqhn2b3; fp. 6akrated from a tuning fork of single frequency travels from air (with speed of sound 340;:fpl3anh 2n.hkwxq2.d64b xaa) da b 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 speaker placed at the bottom of a s/waj a-n u5uyfusy7dc .-pl g* 6/n(cvwimming pool emits a sound wave that travels toward the surface of the water. In the water, the sound wave has a freuan( ycwsv.n6 5gj-ly c/fd* -p /auu7quency $f_{water}$, 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 rectangu/ygcross;z)4 rz. i8tlar glass block with an angle of incidence of ./y szz)rro;c8g 4tsi $0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of light is directed tosp nkohh *iaru9.0 x6ovzh8,,ward a point P on a boundary as shown to the right. Which segment best represents thepxo hu,0. ,r 6hohvsi *k8zn9a refracted ray?

  98.17: Which diagram best represents what happens to a ray of 86*ftgfunr ,al ;7 xr z91dknzlight entering airfxlt1dn g69*kr , znu7z;8raf from water? Air is at the top in all diagrams.

  94.11: The critical angl f: lt,jj,pud9e of a material is the angle of incidence for which the angle tp,j fu9 d,:jlof refraction is:

  95.12: The principle underlying s)il ,.ygj)wpv0z7;a n ue+mxi3x)rp fiber optics is:

  98.36: The critical angle in a transparent substance surrounded by airx09jy /af a t.us;i9yw 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 Xo0 s5nm6 u nwwmbgz1+.elq; xawai336 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 the .3l1wms0o+ex5z36mwn gqb iw6ua; an speed of light in material X?

  03.15: A jeweler can distinguish between a diamond an*;h.qmy:s +9reyac wvd a piece of glass by observing the critical angle of the light in each materia9he;msac.:yr*w vq y+ l. 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. xh m;km4eiw :3jqkxmg.q.61f When the light makes an angle of inc: hx3m ;4j6f1q e.m.xwkmikqgidence 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 y1yqaym, d.u9ue2qk, nfre) ;laser is embedded in a material of index of refraction n. The laser beam emerges fy e,r1,y)9uq kd.yfm2au e; qnrom the material and hits a target. 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 medium 1 to medium 2 to medium 3 as shown in d0i21b6dvf,y d .0 o)u kvwviethe accompanying figure. What is true about the respective indices of refraction (n1, dv fud1v) bw 0 2i0.,ievy6dkon2, and n3)?

  00.14: A beam of light passes from medium 1 to medy j)hjzkzpq mq 0t:803ium 2 to medium 3 as shown in the diagram. What may be concluded about the three y:j0m 3qkqthj8z)z0 pindexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the patlbg o, au5n7/c9a t 5zqjo6jc7h that a light ray takes passing through three transparent materials. The indices of refraction in materials 1, 2, and 3 are n1, n2, and n3, respectively. Which of 9/q5 zlab76j5 o, 7ntogaujcc the following best describes the relation between the indices of refraction?

  09.34: The diagram below shows the path taken by a monochromatic light ray /kxitldu6op-j +k(r85 at l 2ytraveling t 86kjtr+u-xk(lo 2/yitlpda 5 hrough 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 3p00itp cbo n. 666j pykqrpv6in 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 incid5+8u1:ijibf t/ a+bsj9 -,tlm(+ ywolzb gbtg ent on the surface of a rectangular block of glass at an 59ujbag ,1mf+ g/w(8 st+i: z +jllybob-bttiangle 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 wavelengh+t;tk:w 0:sqym.2hu9 n9;t hz6ifs jnnn3k zth 600nm is transmitted from air into a piece of glass. Which one of the labeled arrows best indicates the path of the light ray after it enters the gluz mt sks+zk6n9;hhq ft;n9i:n2:0tny3. wjh ass?

  14.44: A ray of monochromatic light enters the right-triangul -*bfw rg9z,x,ji5 tytar glass as shown. The glass has an index of refraction of 2.00 and it is surrounded by air. Which one ,t5 jrb9xyzg- t,i*fw of the lettered rays shows the path of the light after it exits the glass?