11.24: Two wave pulses travel to the right toward ahw6q8+mki do c2u t.zh gk.*j8 rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best represents the superposition of the pulses when the centers oh+jc2hzmk touk i86*8q g.w.df the individual pulses coincide?

  08.30: A light beam passes through the a y,- tuod;clc+ir and strikes the surface of a plastic block. Which pair of statements correctlocu-d cl y+;,ty describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward throughwny 6 e(q 9qt8z6g/iqk the point labeled B in the diagram shown. t 9qzw8 e(q6k6/ giqynThe 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 reflectitfim ;+ b23b1whpt7(+y ya dvton occurs whenever light is incident on

  05.18: A student hold a hand mifj0/jw uck;4gc.,j x srror 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, she will see the ba0,j;4.jxwsfj gc/u ck ck of her head how far behind the wall mirror?

  14.25: It is observed that a light ray changes direction when it e iw8r9:ofpp-knters a new material. Which one of the following choices is the term best associated k9r w i-o8:pfpwith this phenomenon?

  96.19: Light that has wavelength ofg;;wm p yjau)k )v8k8b 500 nm in air has wavelength 400 nm in a transparent material. What is the index of reuk)kmy ;aj;b)8vpw8g fraction of the material?

  98.04: As sound travels from steel 4oyf3q :ss5*,7dnbew mih,it into air, both its speed and its:

  00.01: As a wave moves from one) l*pm i -k;hrzsvua-gbx53 -u medium to a second medium with a different index of refraction which of the fou-zb-3k*gx ru );p-mlsv5ihallowing wave properties would NEVER change?

  05.47: A sound wave generateg z5;nbg:sp3x 6jl;izd from a tuning fork of single frequency travels from air (with speed of sound 340 m/s) into rock (with speed of sound 1500 m/s). Whi6 3bxizgn:j lg;s;5zpch statement is true about the wavelength and frequency of the sound as it passes from air to rock?

  14.28: A waterproof speaker placed /+r-c z 5a29ci sirpoiat the bottom of a swimming pool emits a sound wave that travels t ipi52or+/ saiczrc9-oward 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 recta uzl-b7jt fxvu-g:zl d;h q448ngular glass block with an angle of vdz4-tl8lxb ; uh:z4ufj 7q-gincidence of $0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of lig 6ra 1pjki-pcwj 3t.u1ht is directed toward a point P on a boundary as shown to the right. W1cr-1jta.6p3 w kup ijhich segment best represents the refracted ray?

  98.17: Which diagram 0l( (kmmal8j6(umlpabest represents what happens to a ray of light entering air from water? Air is at the top in all dj m8m( mkl a0a(u(6plliagrams.

  94.11: The critical angle of a +fgtl l( at .+ g7fpgdefl7j-:material is the angle of incidence for which the angle of refraf-p g(f7+:f. ej+7 l tgltalgdction is:

  95.12: The principle under7o/ak.r).jppb lign7rye 5, ptlo z.2 lying fiber optics is:

  98.36: The critical angle in a transparent substance surroundephon97s;hc 5 q-wd+jld 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 mat w46nt m)*jq/o o*uzuierial 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 )6ut4 ij/ow**omqzn uv, what is the speed of light in material X?

  03.15: A jeweler can distinguish betweol ii:) 5a4arnen a diamond and a piece of glass by observing the :rlia5 i4noa)critical 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 m7.swr gopj5b 7(tr xq-akes an angle of incidence equal to s7xqrw( 7ot 5g.rbjp-$30.0^{\circ}$, 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 refraction n.p6 ,w hh a) 8ijffp4r1za5urmlren8*2 The laser beam emerges from the material and hits a target. See the accompanying figure for the position paramet jeua l1,8hm)64 fi zw2h*fra8ppr n5rers of the laser and target. The value of n is:

  95.31: A beam of light 3.(a2szxay6 q3dkao p passes from medium 1 to medium 2 to medium 3 as shown in the accompanya3az as3o xk .p6(yq2ding figure. What is true about the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1hf*xwk. fs/ kbf;w; ca)lpte: 7-3p jf to medium 2 to medium 3 as shown in the diagram. What may be concluded about the thr-kf;h7*w 3xjfp f;c klsb/p)t.e : fawee indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray takes pb,k 92n9rhmrqhifz: ons /u) (assing through three transparent materials. The indices of refraction in materials 1, 2, and 3 are n1, n2, and n3,r ki)z bo:h2 r9,9/sum(hqn fn respectively. Which of the following best describes the relation between the indices of refraction?

  09.34: The diagram below shows the paw5;5kl ngk+jath taken by a monochromatic light ray traveling through;j+lnkw ak5 5g 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 gii)+ly g1ip4+0op cto lass ($n_g$=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 o 5a j qt08(jb1h5lq3xjq5ede qn the surface of a rectangular block of glass atj dq 5qx15ja85qeeh lqjt 03b( an 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 f xd9h,7uens;q l h1ff8rom air into a piece of glass. Whicx hnqhfsl8, 7fd; eu19h one of the labeled arrows best indicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic li-* ek3qf)kw;6s q zm mr9zz+jight enters the right-triangular glass as shown. The glass has an index of refraction of 2.00 and it is surrounded by air. Which one of the lettered rays s)9*m 6 ;zkmzisfewjzr+-qkq3 hows the path of the light after it exits the glass?