11.24: Two wave pulses g.c;- eu tmsr nduu7y* 692wqbtravel to the right toward a rigid boundary as shown. After reflection of the trcqntusm*uy9g-72b;e ur6w. diangular 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 the air and8bjn 8nahg;z, strikes the surface of a plastic block. Which pair of ;hjga 8,8bz nnstatements 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 m4n3 ,i7i 6f/tq tpqq5e5dgm hlabeled B in the diagram sh,37nqp igf t dq6 /mi55qthe4mown. 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 occurs whennma43)mesa+cm 4v tk9mv)2 ocever light is incident on

  05.18: A student hold a hand mirror to observe the back of her head while stpmk) xijoi+k+/ 3s c5landing 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+p)+ /jio mx 5lcki3ks back of her head how far behind the wall mirror?

  14.25: It is observed that a light ray cbd fdf1qd * c9.u9 by0.u)vfsshanges direction when it enters a new mat*fqy )9v. 1cs.b fd0dfu9busd erial. 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 hasx 386sobhsksk 7rz +g( wavelength 400 nm in a transparent material. What is the index of refraction os3os6 s g7hkkzbx8+ r(f the material?

  98.04: As sound travels from steel into air,r7y ahx 6vd*u 9a n mlew,txo)3e;z28m both its speed and its:

  00.01: As a wave moves from one medium to a second medium with a diq0 fz r1jh ,ukgzf)+b-*8bz zifferent index of refraction which of the fol zzr)gzhb 1q ju +8,0kif*fzb-lowing wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of single freqjktmy37y (xl-* *zh jxuency 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 wavelen(lxty-z yx*j 3jk*m h7gth 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 emitsp ph- 7e(fbyq g4n;pb 0ave)+v a sound wave that travels towaga;p p7h)ef- qvbv0p4en ( yb+rd 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 white3a2 e/in 0zg9m8cq vnj light strikes a rectangular glass block with an angl i3ajz8 029nngcem q/ve 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 j.zzsr2ykc:x l:/)mxpoint P on a boundary as shown to the right. Which segmenlr) c/z2 xyx.:kmsz:jt best represents the refracted ray?

  98.17: Which diagram best represents wha2,fmbh5a tkq8i/n3 t9ryh ps7t happens to a ray of light entering air from water? Air is at the topmrsqpt723n 5t,i/ ayb kh89f h in all diagrams.

  94.11: The critical angle of a matj7w tfz-c ecjxuj2;.8t :i*ererial is the angle of incidence for which the angle j-*ztix 7e:ejc;wc8.2f j urt of refraction is:

  95.12: The principle underlying fiber optics isssw o/3ggr*)tl( *jl f:

  98.36: The critical angle in a transparent substance 09l mb6zcr 6*ke nta cx0.bngnc2./tzsurrounded 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 ofqcpm*; m,r4 r rtvx9+nm nhh41 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 vrpxrq+ c n44,9r;h*mh mv1nm t, what is the speed of light in material X?

  03.15: A jeweler can distinguish between a diamond and a i,j.g7g e:beypiece of glass by observing the critical angle of the light in each material. Glass with an index of refraction of 1.5:g7g.ejbi ,ye2 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 clearrp6hhvgdz7q v03 wp6z1e x3i7 material. When the light makes an angle of incidence equal 7e0vwg7pz3 36vixd1prhzqh 6 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 refractionnrfu/7x p)vc5 n. The laser beam emerges from tx pv/)uc5n7 frhe 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 from medium 1+ ium v2j9j6.s8pcw tn to medium 2 to medium 3 as shown in the accompanying figure. What is ns u.tj+pmi9 jvw628 ctrue about the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes fpo hv56cag: ,mn9 :r)+ /ga+qvfykctcrom medium 1 to medium 2 to medium 3 as shown in +va5grv+cfkt6pc )ag:,/:9n yqm hocthe diagram. What may be concluded about the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray(5id/4bhv2 hqt * fmnl takes passing through three transparent materials. The imh*25h 4df(v itb n/qlndices 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 path taken by a monochromatic ligh,, wk i/7eoee/kru w3ht ray traveling through three media.The symbol3, iwhk oee7/e/kuw,rs $v_1$,$\lambda_1$ , 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 -g bfl8cag;y rj)v.v; 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 incident on the surface of a rectan *sj; w)l-sy ysw7la8xgular block of glass at a87)a l-wx s;sy*ywj lsn 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 transmitted from ajff9c )+a5v vsc26 jiqir into a piece of glass. Which one of the labeled arrows best indicates the path of 5 vjc+cv2ifqs)fa96j the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters the right-triangular glass as 4h0 snk68kkfw(v5b5ks/ axf3 fyho(p shown. The glass has an index of refraction of 2.00 and it is surrounded by air. Which one of thk 4/nkw5v(hah x( ff56s 0kk38oby psfe lettered rays shows the path of the light after it exits the glass?