11.24: Two wave pulses travej -mg -hpwy4:wqks4-cl to the right toward a rigid boundary as shown. After reflection of th p-4 w--cm yqjsgkhw:4e triangular pulse, the pulses will interfere. Which 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 thof3j4;9 odod we air and strikes the surface of a plastic block. Which pair of statements correctly describes the phase changes for thjd94oo dfw3o;e reflected wave and the transmitted wave?

  12.02: A ray of light.i a0be*ram/lpwy.f q8b qg4a mc* (9q passes straight downward through the point labeled B in the diagram shown. The ray reaches a flat *bp l90q4qgirw b8yma a.m c(*qa/.ef 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 incidehlepal8 eslxo), c*.,3dl ,fznt on

  05.18: A student hold a hand mirror to observe the back of her head while sh5rfe9 4ifwi9 /yc: vhtanding 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, shew 9/9:hf4yfihver i5c will see the back of her head how far behind the wall mirror?

  14.25: It is observed that a light ray changes directionrgorvwl) jyf0rj. /(zy 6 3g6c37esxd when it enters a new material. Which one of the following choices is the term b/y s6 zx0 g)y3d36g( jj.cv rrf7olwerest associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavelength 44 1px lkml6j19xpoc 6q1r4wsl1. nudg00 nm in a transparent material. What is the indejl4d.1g m1cpp6w4rn1xko96 1suqx ll x of refraction of the material?

  98.04: As sound travels from stevec9 qz /ypyao*4/b*uel into air, both its speed and its:

  00.01: As a wave moves fh -dydd+ndh .* fjc-m)rom one medium to a second medium with a different index of refraction which of the following wave -.d-dydd h)j*+hn fmcproperties would NEVER change?

  05.47: A sound wave generated from a t 0:8emrh.gbj iuning fork of single frequency travels 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 it passbjmrh8g i: 0.ees from air to rock?

  14.28: A waterproof speaker placed at the bottom of a swimming pool emjv;ov lz2c15t its a sound wave that travels toward the surface of the water. In the 5ovj v2z;l ct1water, 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 block with mn-o clc0ey i:68xd 9qan angle of imno:e q6dcy9c i-08xlncidence 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 Pyzd 445pl,o0awu e*wt on a boundary as shown to the right. Which segment best represents the reu0l 4, o p5wz*aet4wdyfracted ray?

  98.17: Which diagram best represents whs05p y wh qk5yw7yxu9+z:wcq2at happens to a ray of light entering air from water? Air i wx0 qzh :qy5ys5 c97wypu+kw2s at the top in all diagrams.

  94.11: The critical angle of a material is the angle of incid 8ih- ly3glfr+; kqtz9o o(u.a0q*ywaence for which the aol uy*i+-ozqka gtl ; 0aq. r(38fh9ywngle of refraction is:

  95.12: The principle underlying fiber opticz1/ ;+dy: ;aq m2gwgfae5cykk s is:

  98.36: The critical angle in a transparent substance surroundeg+q /8 xej1z,m4sfl fkd 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 ij d j ee/u5a.al0)ct6endex of refraction of n = 1.5 to material Y with an index of refr.)0e/j 5edctu e6jaal action 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 dis i 7j,tkm:e3p.:vgf tetinguish between a diamond and a piece of glass by observing the critiit ee3vt:fmp:.g 7k j,cal angle of the light 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 anlv) j75t7 w*g.6ponn rlg9sz p angle of incidence equal t7po* l rnj)wng57p.zg vl96s 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 refrac1v;m 5v 2yecyxb0-doation n. The laser beam emerges from the material and hits v;bcm 15v d oyey02ax-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 asv-bh:h2tos7 rwqw1h9*m x*u b shown in the accompanying ohb-bmq*1h 2 r9:tx wsh7 *uwvfigure. What is true about the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes e31z6 kh) lenwfrom medium 1 to medium 2 to medium 3 as shown in the diagram. What may be concluded about the three indexes of re l1)nz6hwke3 efraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray takes pjm.csqy u8v8nm9 kfsjuh ; r-(d :b1s-assing through three transparent materialsb-uk 8 njcsy (shjm 1;f8qmv9udr.- s:. The indices of refraction in materials 1, 2, and 3 are n1, n2, and n3, respectively. Which of the following best describes the relation between the indices of refraction?

  09.34: The diagram be :twck :ao eln3x2 ;5wll8ch-elow shows the path taken by a monochromatic light ray traveling tt3w-xnlhk 8ee; c 5acl: l2:owhrough 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 glass xdr5)/crmb n -($n_g$=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 of a rectangull4t d 048tybplar block of glass at an angle of 4blpl 0 4tdyt8$45^{\circ}$. 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 wavelengt/ ..xftm vwr*uh 600nm is transmitted from air into a piece of glass. Which one of the labeled arrows best ir/m x .uwft*v.ndicates the path of the light ray after it enters the glass?

  14.44: A ray of monochocb 5hw t.ozw u7t*/(oromatic light enters the right-triangular glass as shown. The glass has an index of refraction o/5hzb7tow ct wo *.(ouf 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?