11.24: Two wave pulses travel to the right 9 ;md ndxtjn(9 toward a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictn;(tdjmx9n d9 ures best represents the superposition of the pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes through the air ant :1pp 7kb uf et,wlce*(lob5(d strikes the surface of a plastic block. Whikf,(w1 o:cplet t(p5eb b*u 7lch pair of statements correctly describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passe5v- gzo7s9v 6mwf7fh as straight downward through the point labeled B in the diagram shown. The ray reaches a flat mirror placed at s7vwzg 5mf67oh -fav9 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 reflectionxrn *gb1x,dfz+ k,u0c ykug .5 occurs whenever light is incident on

  05.18: A student hold a hand mirror to observe the bahubp 3 q2uvxxg+ 3:mf1ck 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, she will see the back of her head how far behind the wal2x3xf:+ u m1u qhpv3gbl mirror?

  14.25: It is observed that a light ray changes direction when i 0stkn3k1eypdb+g 3r9 c; g.yrt enters a new mare3kst;9n3 0cypdb rkgg +1.yterial. Which one of the following choices is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavelen7ez)h m3rre.ba5 /me tgth 400 nm in a transparent material. What im7 b3 hzrre5.mae/ )ets the index of refraction of the material?

  98.04: As sound travels from steel into air, both its speed and its:3vrtsp4mx:r za .- rq)/ /jouw

  00.01: As a wave moves from onsh2n(v)d mj(vjpl *39tcfy/pe medium to a second medium with a different index of refraction which of the following wave properties would NEvspjfm2v (9*j/3y)(clnh dp tVER change?

  05.47: A sound wave generated from a tuning fowr3lc;a +u cg0f o3nj9rk of single frequency travels from air (with speed of sound 340 m/s) into rock (with speed of sound 1500 m/s). Which s;co f u0a+g3wr9jc3nltatement 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 swimming pool emits ad 0vqn+6 1-r)f dfynf0f1w cg1f eya-l sound wave that travels to)af w-ygfyde n+ 1v1dr1 c6fn0-f0f qlward the surface of the 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 light strikes a rectangularn+ m1d(igl o gylwg: qto0m/,5 glass block with an angle of incidencew0no+, log/ly15m gm(gd: qt i 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 :bxrt;-1tlr1i ym/vihiuv/ )as shown to thiv i/br):mi uyl1 h /t1vr-x;te right. Which segment best represents the refracted ray?

  98.17: Which diagram best represents what happens to a ray of x15;jszj qo 2dfbw/y(2ov i9qy.c5h rlight entering air from water? Air is at the top in all di/f(o ;5zwi. vbxo52y2r 91sc qhjyq jdagrams.

  94.11: The critical anglc yfn ,h s)a f)wb:3w+c+p,znge of a material is the angle of incidence for which the angleaz)snff,p w w,g)n++hc3:yb c of refraction is:

  95.12: The principle underlyincl 5)v 1sov 0,.rupy2yw 1geeig fiber optics is:

  98.36: The critical angle in a transparent substance surrounded by airzm +rw+lg 8ga0 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 m4a+ntr mczpvc 2+4q g1aterial 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 the speed of lig rm 21tzcg4+vq+4pcnaht in material X?

  03.15: A jeweler can distinguish between a diamond and a piece of gla: t2q,g,u b ;lweygyy/ss by observing the critical angle of the light in each material. Glass with ang:u ,l t;/y2w, gbyyqe 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 4eq;-eugmd grga *1t*a clear material. When the light makes an angle of incidence e4*udq*aggrt g;e m-e1 qual 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 lxc;r,f: /m :0f a:rsp5hjrcbgaser is embedded in a material of index of refraction n. The laser bea:p/: b a,0cg5 fcfrrrm;xs:hjm emerges 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 passes fromw3s ,hna8 b0ng medium 1 to medium 2 to medium 3 as shown in the accompanying figure. What is true about the respective indices of refraction (n1, n2, and n3) a3s b0ng8,hnw?

  00.14: A beam of light passes from mediume+lmd)kyfx e3tn0 (02q q oe8h 1 to medium 2 to medium 3 as shown in the diagram. What may be concluded about the three indexes of t yd( )n+3 foel0hqkxm2e8e0q refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray takes(is gqbze5 d/png )(g6 passing through three trae dgzsq g(g/b5)in 6p(nsparent materials. 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 below shows the pmj ht+*uo.qqny*;g , gath taken by a monochromatic light ray traveling through three med,tqm;gyjo *gq+un *h .ia.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 g:(7olgfuk m/vt d5qk8ckyv 5))thj (vlass ($n_g$=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 i yzhd,2s:-.rf k,irj*7dv z sjs incident on the surface of a rectangular block of glass at an angle o,*rf,2k ss-hj:zdij y 7 .zrdvf $45^{\circ}$. 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 from air into a p+ ;hox8i j. edt4pp2doiece of glass. Which one of the labeled arrows best indicates the pat2 od8h jipde+4tp.x; oh of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters the right-triangular g w4wd8bl( d4 :l9jiffelass as shown. The glass has an index of refraction of 2.00 dwebdi4f8:f9w j4 (lland it is surrounded by air. Which one of the lettered rays shows the path of the light after it exits the glass?