11.24: Two wave pulses travel to the right toward a rigid boundary as shown. 9dlm7tph :gfdb77: uw After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best represents the superposition uw h:9b7 7d:dtglp7mfof the pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes through the air and strikes7pnd:ru 5 qg-d the surface of a plastic block. Which pair of statements cqp-d :7nudgr5 orrectly describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight dule 4j 0ek2k(b)g tjv7ownward through the point labeled B in the diagram shown.e jet7( j)k bgl2ukv04 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 -cw u)0is .nqroccurs whenever light is incident on

  05.18: A student hold a hand mirror to observe the bs) lh+ +m;:xzs ifuo.l) 9hynlack of her head while standing in front of and looking i).s;+ll)hfnx mi9ylz:u os+hnto 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 her head how far behind the wall mirror?

  14.25: It is observed tnhsqen (5z z4-hat a light ray changes direction when it enters a new material. Which one of the following choices is the hszq4z5(e-nnterm best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavelength 400 nhq4klph*0(cj ya* u:e m in a transparent matyh0eu(l4:*hkc *p qajerial. What is the index of refraction of the material?

  98.04: As sound travels from steel into air, both ijpk;uo/w2vhj+/rzv3i, 1n d nts speed and its:

  00.01: As a wave moves frk+2v x aze9 nv4m-vzdy;yz0g(om one medium to a second medium with a different index of refraction which of the following wave properties would NEVEmngz e-+ 0k;yv29vz4d axv (zyR change?

  05.47: A sound wave genvobox;tz) *t.d 2 zvt+(rnt3kgijc,5erated from a tuning fork of single frequency travels from air (z2 j xtbvrtk.n)ogz( vot;53 t*+ci d,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 placed at the bottom of a swimmckb/ 13xmc lm me ti x44b4ee,fb;3xi1ing pool emits a sound wave that travels toward the surface of f m1xe 3 bbm c/ x444ckxt;eel,3i1mibthe 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 lighmbv2x4)t c3abt strikes a rectangular glass block with an angle of incidenc)c3 4bv2ma tbxe 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 1cr6mlrrc3j + point P on a boundary as shown to the right. Which ser 1mcrc jl36r+gment best represents the refracted ray?

  98.17: Which diagram best represents what happens to a ray of la*oysrga3pv3 pf)* 6yight entering air from water? Air is at the top in aaop g6 f*3ryp *yvs)3all diagrams.

  94.11: The critical angle of a material is the angle of incidence for which the ijl+ ou-b+v j-angle j-bj+ lo-+uivof refraction is:

  95.12: The principle underlying fiber optics i,-zfghl 8ufml uf 4tnj2 *1eo8s:

  98.36: The critical angle in aoah.pkhhq vn .5t; n38 transparent substance surrounded 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 refrac dwpb5vy3 p:y;+i qs/j6ct*eption of n = 1.5 to material Y with an index of refraction of n = 2.0. If the speed of light in materjyb 536:p pcv tq*w;y+des/ipial Y is v, what is the speed of light in material X?

  03.15: A jeweler can disting20ye zgekcjl4s77u r,*i)lb n uish between a diamond and a piece of glass by observing the critical angle of the light) k*erz0ei,bgy27lcl4u jns7 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 light makes an y- t 3)qdeke;xangle of inciden)e;kqetxdy - 3ce 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 induuo 14e- ejldfh01 iq8 kb/o:-v wsn4qex of refraction n. The laser beam emerges from the material and hits a target. See the accompanying figure for the position parakboo4i01vs4-ld8wu :1uj en qhe-f q/ meters of the laser and target. The value of n is:

  95.31: A beam of light passes from medium 1 piyo*kk 4 ,+/xk 3hxiyda 8lkxd/b z,ilc3g 1-to medium 2 to medium 3 as shown in the accompanying fi+,dlp*1yy k/ i ,oi zxki4-ck/a bdg83k l3xxhgure. What is true about the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to hzrqek0ret .d 0;6rwo joqi976h*,qomedium 2 to medium 3 as shown in the diagram. What may be concluded about the three indexes of r*oez;rd h eti6q0 9oj.06,k w oq7qrrhefraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray takes pa znd l14:.xhob nk*zjawc*-u: ssing through three transparent materials. The indices of refraction in materials 1, 2, and 3 are n1, n2, and n *:nzd-czo: bw4uakj.1l hn*x3, respectively. Which of the following best describes the relation between the indices of refraction?

  09.34: The diagram below shows *g0 z):oehwfde oyv y.c;7h 9pthe path taken by a monochromatic light ray traveling through three me9.yee pohvf w*;0 7d:zhygco)dia.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 la 6dawl8o;;:.pdpnv 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 4agg zlkrj2 1e1i9s61 ,r4fizrgf)miis incident on the surface of a rectangular block of glass at an)4gglsrza61re, mziki fgr 214jfi 9 1 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 tra2j0 s.qqhw1y5bc9 luansmitted from air into a piece of glass. Which one of the labeled arrows best indicates the path of the light ray after ity1.209b5j aql qchu sw enters the glass?

  14.44: A ray of monochromatic l37j-qu:+nn srr13go 1 v e:,euxbpjk cight enters the right-triangular glass as shown. The glass has abu3ncxo::r7nqp+1j-3ugs 1 , ejv erkn 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 the glass?