11.24: Two wave pulses travel to the rpdn;38: da d2dnlpmd )5f dnf5ight toward a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. W5 dp)pf3d:ln 52ndd d;8dfnam hich 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 and6j(/hw5 qeer v strikes the surface of a plastic block. Which pair of statemev(5 wr /h6qeejnts 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 ly6p:)dm 1 jkosrwe *+ labeled B in the diagram shown. The ray reaches a flat mirror placed at ap k)mr *:+jyel6 1doswn 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 wheneverix bmb ut9ym2 ;clc,2( light is incident on

  05.18: A student hold a ha m3 :std o/l ksuvl8i(nie24v;m2v/cynd mirror 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 ft behind her head, ico8umd:;(sekml24 nst /v3i lv/ 2yvshe will see the back of her head how far behind the wall mirror?

  14.25: It is observe awi;, b8awb5u-jlx(9q pjlu3d that a light ray changes direction when it enters a new material. Which one of the following choices is the ter3jau9 pwj8 abw,-qlilu;( bx5 m best associated with this phenomenon?

  96.19: Light that has wavelength ofiswfl -8;g e uj78scv; 500 nm in air has wavelength 400 nm in a transparent material. What sl fu7cv8-8wj ie;; sgis the index of refraction of the material?

  98.04: As sound travels from steel into air, both( nfsv hfbh. 2tcc6ecd93ry 98 its speed and its:

  00.01: As a wave moves from one medium toybr.tr96)pk6(zx 5dwg (aisi a second medium with a different indexb p9(66sryw.zaii()t5drg k x of refraction which of the following wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of single frequency travel;fi4k z gi:s1ls from 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 itfi:zg l;ks4i1 passes from air to rock?

  14.28: A waterproof speaker placed at the bottom ofr7exbok/z /(ptu6 wo5 kbggw m 6**p9v a swimming pool emits a sound wave that travels toward the surface of the water. In the wa7/(*gbvz k wo 6x6 gu5or9mbepptk w*/ter, 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 rectangular glass earlck3l yj;72 q;mg1block with an angle of inciyla;g3r 2ck1lmj7 eq;dence 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 towar 0dg4ev; hnnw*d a point P on a boundary as shown to the right. Which segment beswhv 4dg*ne;0n t represents the refracted ray?

  98.17: Which diagram be63ejihob42 eu st represents what happens to a ray of light entering air from water? iejbe 4u63h o2Air is at the top in all diagrams.

  94.11: The critical angle of a matemkgx5 d ;v:js,rial is the angle of incidence for which the angle v,d5x:gsk jm; of refraction is:

  95.12: The principle underlying fiauvddk2x2q/*k) fo1q ber optics is:

  98.36: The critical angle in a68:jripqtne*hc gy8kjfr g+. j 4,m2 o 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 n,d -kq )ms kj**g6z:..(amikvri ous an index of refraction of n = 1.5 to material k *q.ksoa.)unk,:jr6s(dz im m*v-g i Y with an index of refraction 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 be51w83y ujc nretween a diamond and a piece of glass by observing the critical angle of the light in each material.3wnecu5j 8ry1 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 fus ex9k0s zdx -:m;)ofrom air into a clear material. When the light makes an angle of incidu 9)-kz:so0f m ;dxsxeence 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 of refractiolxfor 9pq 0pi4.iwc- 1n n. The laser beam emerges from the material and hits a target. See the accompanying figure for the position param. r - 4lowf0ipp9q1cixeters of the laser and target. The value of n is:

  95.31: A beam of light passes from medium 1 to medium 2z9cv y*cd wr1,/cs3 szmk79bc to medium 3 as shown in the accompanying figure. What is true about the respective indices of refraction sdc1 vmy39wscz9k*, rz 7 cc/b(n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to medium 3 as shtvtnaaj;9n o( j20lj; own in the diagram. What may be concluded about the three indexes of refraction, n1, n2 and n3? a;v;jtjo n(lt0an2j 9

  97.24: The accompanying diagram s.j1bep 8b2 lyob8 :anyhows the path 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 the following best descrply8 b1oyn b.8ej 2ba:ibes the relation between the indices of refraction?

  09.34: The diagram below shows the path taken by a m l+ njs j.x *8hy.tdwno1ju,rhi8 ;)yfonochromatic light ray traveling througtjnr x. , +1h8sif8wnu yj)*;yj.dolhh 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 in glas* es*xy u7vner x5mnwh9ipm49f -63st s ($n_g$=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 on the surface ofgx5tx k. (uk0fmg n ,,d/fna6dgy*k0t a rectangular block of glass at an angle *5kdn0fd,xugg/ k m(x ntk6, gt.0ayfof $45^{\circ}$. 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 transmittv i+g x)xl14wj)ey-m ua3 3saued from air into a piece of glass. Which one of the labeled arrows best indus1w4yv ij +a)lua3 em-)3gxx icates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters the right-triangulcf toi:elsv((g5y-,. un ppb0 am*4xlar glass as shown. The glass has an index of refraction of 2.00 and it is surrounded by aim0x 4bupn ,lp(f agv5*yc-: teiol(.sr. Which one of the lettered rays shows the path of the light after it exits the glass?