11.24: Two wave pulses travel to the jam70r., tw*2v ziwlx2pvrgqig4,x2 right toward a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures 2 p.0wqgm,l, rxavzi vtw 472i2xr*gjbest represents the superposition of the pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes through the air an v9 fu g6c0.0t l)vwpnxytq) 6qimy,ktg x-/9nd strikes the surface of a plastic block. Which pair of statements correct vnpggi6 uyxq0-0 c9tknlft )q),69y.xwtm/vly describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward through the point + (vndlgc8 bhmwm54asw9y6 31wsl hf6labeled B in the ddv sm849 ywal+f6lgm51 6nwsh w (3chbiagram 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 reflection occurs wheneve58xh6 0wk4zy(z h7gxmqq3ag j r light is incident on

  05.18: A student hold a hand mirror to observe the back of htnw e)hhd-paen ng7x .b:;*0ler 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 sh pd.whthe-agnn l)x;nb:07 *ee holds the hand mirror 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 direction when it entergq* wu g nnc7wq(*h9lrjx7 bv01sb )t0s a new material. Which one of the following choices is the term best associated with this phenomgxtq*)cb0s nvr *791h ngw(jbul07 wq enon?

  96.19: Light that has wavelength of 500 nm in air has wavelength 400 nm rt aud0;y/ s:,aeih-)v b.l o8qrlp +min a transparent material. What is the index of refraction of the materiua.ie ;/ 8prl av o-yd:tbs)h,m0q+rlal?

  98.04: As sound travels from steel into air, both its speefgurlen++-( -1f q, vknwft k9d and its:

  00.01: As a wave moves from one medium to a second fn6 qso/y8+n1.j cover,fuo*medium with a different index of refraction which of the following wave propnon*, 6uey8f j/+ fcroq. s1overties would NEVER change?

  05.47: A sound wave generated from k jbl2jkd px6p92,-z;e8; i jbycijg 0a tuning fork of single frequency travels fro 02bkzpecy pjbjg-269j8i jik ,;;xldm 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 frequency of the sound as it passes from air to rock?

  14.28: A waterproof speaker.+ urqi :53bl a2 uo*q0jdrsfi placed at the bottom of a swimming pool emits a sound wave that travels toward the surface of the water. In the wateu0 ql of+i2 :diqsrj.a*b u3r5r, 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 rectannzhfal 8-p*9q qio 8a(gular glass block with an angle of incidence of q- *l8ifqa9 aphno8 z($0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of light is directed toward ands3+x5 k( wi g-b4ock point P on a boundary as shown to the right. Which segment best represents the refra igw5 x+kn-o4b3(s dkccted ray?

  98.17: Which diagram bez2dbf85q j* de572hls rigo7 vst represents what happens to a ray of light entering air from water? Air is at the top in all8b2fhl2es5 *g7orj75di dqz v diagrams.

  94.11: The critical angle of a material is the a8 hslpx8 bo3g7ngle of incidence for which the angle of refraction slg 8bo87x3p his:

  95.12: The principle underlying fiber opticsf:qyrf5dx y-b06 33oabmbtr+ is:

  98.36: The critical angle in a transparent substance surroun ,xk;c(tbe-sz0 0nrg 2 s2idyoded 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 from9+d;jf8k y qsz 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, what is tfq yk +z9;d8sjhe speed of light in material X?

  03.15: A jeweler can distinguish between a diamond and a piece3 lxqj5;bg+oma+- ut bidn(/m of glass by observing the critical angle of the light in each material. Glass with an index of/ tj;amd-ubq5( b io+3mln +xg 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 light /,tkxc np4 x8omakes an angle of inc pon c/,x84kxtidence 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 ofh* ;xjg+ qfq/3gj; yes refraction n. The laser beam emerges from the material and hits a target. See the accompanying figure for the position parametgqx;+e; qjy*s h3j/fg ers 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 asa*4 xdpu, -l3-1txt h 0fvi tm1f6cxxl shown in the accompanying figure. What is true about the respective indices of refixtc hv4t61x 3x t,p md*ux1al-0-fflraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 t(pe peo6voopg f k:4r c/mb-5*d. j6az5qfsn- o medium 3 as shown in the diagram. What may be concluded about the three indexes of refraction,gcd.f -o oe z:nkf5m qseor a64pv6-(pbpj5*/ n1, n2 and n3?

  97.24: The accompanying diagram shows the path tlf*2 qk l4fwwr;y*qu*) sz/ iihat 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 the following besrlqz**2i y /wf s*klq )f4;uiwt describes the relation between the indices of refraction?

  09.34: The diagram below shows the path taken by a monochromatic li 4anb1fhm(6l jght ray traveli6af 1ljbn4m( hng 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 tra8xwa9ab6j gx y(qj.bb omm z5vd1;4,eveling 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 incidolkyrw6 wj ;(9sz8xwg 7yqj4 -ent on the surface of a rectangular block of glass at an angle ; lrk9x4(wsy 7 8wwogzj -q6jyof $45^{\circ}$. 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 waveleng3lqbb n*bri( k8/f2hm th 600nm is transmitted from air into a piece of glass. Which one of the labeled arrows best indicates the2(/lbfh3q r8kn b*mib path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters g() xh+1ygw9t-kw p xtthe right-triangular glass as shown. The glass has an inde gtxhw(g9 xp+)1-tywk x 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 the glass?