11.24: Two wave pulses travel to the right toward a rigid boundary as s ofjwdh8,sb;x n1t+d, hown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best represents the superposition8fon,xs jw+ dhtb,d ;1 of the pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes through the air and strikes the su og tb:;:m:mqiz0a9c crface of a plastic block. Which pair of statement0tz m q:c:9:mai g;bocs correctly describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward through the point labelnlj2,m-g+x-t jnn)zo qqbu*: ed B in the diagram shown. The ray reach,z nlmjx*)u+ n2q-n:gqjob -tes 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 whenever light is inci2b) i 8f1 u4xrzok o1lf.rgu+ident on

  05.18: A student hold a hand mirror to observe the back of her head bc0l9x ,exqfxx* 0*azwhile 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 hq*fzbx,c 00*e lxxa9xead, 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 enters a nzlio 5vmk- z.q5/m4iq lfd2+aew material. Which one of the following choices is the term b a/ moq z.5lfi2ik+ qd5lmv4-zest associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in a9u qyh hgf4hposmc 01t72 9j7dir has wavelength 400 nm in a transparent material. What is the 21puhhjtmf79yh97o ds q0c 4 gindex of refraction of the material?

  98.04: As sound travels from steel into air, both885 aboo x4zjnk v*9xk its speed and its:

  00.01: As a wave moves from one medium to a second m ied9i8nq09qn edium with a different index of refraction which of the following wave0di 9 in98nqqe properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of singli tq(k6ts; jg 0/6 t3*lgpfzcwhlec*3kid62le frequency travels from air (with speed of sound 340 m/s) into rock (wj gcg z 63l6k2se;dp(t/tw6hk*i3ft*cqi ll 0ith 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 bottol(a1mmlk,x9o m of a swimming pool emits a sound wave that travels toward the surface of the water. In the water, the sound wave has a frequency ol( ,ak1 x9lmm$f_{water}$, 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 rectangular glass block with an annrd8fzvd6j15 g hhg2ae)4 fv9xng()mf8 dgz)1hv5(g4n grxj6n 9e2 )hdavmf gle 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 boundary as sh8u wa1wwwa2n x1t24nsown to the right. Which segment best represents the refracted ruwwat4w1n18 xwans 22ay?

  98.17: Which diagram best represents what happens to a ray of light enqf-,gddxrdvihx * -is0te. 9:tering air from ditfd* q-g .irvx-se9x:,hd0water? Air is at the top in all diagrams.

  94.11: The critical angle of9lamfk ga(/0xl7 g9 bgz vu.d. a material is the angle of incidence for which the angld .m7gl.az(9lv /g 0kf9xagbue of refraction is:

  95.12: The principle underlying fibjm;- q8 ;+ftbz qrig9qer optics is:

  98.36: The critical angle in a transparent substancyruo; 9 )rki. z d k4/z)2)valollg o*e/n7skoe 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 nb u,uin( jr zt.,+e7sof 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, wh nsu.nebit,(7 uzjr, +at is the speed of light in material X?

  03.15: A jeweler can distinguish betweeb2qlp4; v8j hen a diamond and a piece of glass by observing the critical angle of the light in each materia24lp8bje ;hqvl. 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 materi5**dfcye ga4q;9 pzmpal. When the light makes an angle ofmygc4f5dp9 apq* ;e*z 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 embedded in a mater3 f*7 cefst 4p.kagmtyerg2n /h4:oq,ial of index of refraction n. The laser beam emg*ts. 2for:47e ynh,m ck4 /fe3tpqag erges from 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 passexwv1bso 9.4xzs from medium 1 to medium 2 to medium 3 as shown in the accompanying figure. What is true bzo .1 9xsvx4wabout the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to medium 4wcmy8okwzf n dy6 y+y3b)x./3 as shown in twy4nbwf dz+ykx/y 6).m3o8yc he diagram. What may be concluded about the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagramipbotfk5*-s ).7 .8fs hccpac shows the path that a light ray takes passing through three transparent materials. The indices of refraction in materials 1, 2, and 3 are tac87 .bp5)si*c o hsfcpk -.fn1, n2, and n3, respectively. Which of the following best describes the relation between the indices of refraction?

  09.34: The diagram be .:tk vqn8wve2v,aj* -fspsl -27ztzblow shows the path taken by a monochromatic light ray traveling through thrl ev2v z:bzj,-s k*wt2qp8s a t7nfv.-ee 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 lign kk xjvqv 8s+ 1,et:w1(1d:vnykmp(rht traveling 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 iij e(rul-nfp 3+4 :ayencident on the surface of a rectangular block of glass at an a+up:nlj43 (eefyr-a i ngle 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 transmitted fromxv7 a94az1ipn air into a piece of glass. Which one of the labeled arrows best indicates the path of the light ray after it enters the vaa4izp1x7n9 glass?

  14.44: A ray of monoch btlu;b;a (-tzhtbv81romatic light enters the right-triangular glass as shown. The glass has1tzb8(lb;tb- av t;hu 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 the glass?