11.24: Two wave pulses travel to the right toward a (. ((0u crsqslabo+oi rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the follo cb.+q su((iroao(l0swing pictures best represents the superposition of the pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes through thev4ymx4e1qxk 9 air and strikes the surface of a plastic block. Which pair of statements correctly describes the phase changes for the reflected wave and the transmitted wave?xq 4yv m9e1k4x

  12.02: A ray of light passes straight downward through the point labeled B b9 mfevzwg-* 8in the diagram shown. The rzw-bm8e v f9g*ay 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 whenever light is inciden:*9e s ttzlkp.9sc q:tt on

  05.18: A student hold a hand mirror to observe the back of her head while 9rh2.zym*c eq standing in front of and looking into a wall mirror. If she is standing 4 ft inzr29ym.*qech 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 wall mirror?

  14.25: It is observed that a light ray changes directionfcfw3)b f7hy9h3)egm rxc 6z: when it enters a new material. Which one of the following choices3m)ec:) xffrch3gfb y7z6w9h is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavelengthbv6zdext4um z8 y7 06c 400 nm in a transparent material. What is the index of refract4c 7ymvb d8e6zx0ztu6 ion of the material?

  98.04: As sound travels from steel into air, both its speed andh/)u r9p;spwky2s5 p)mxxn - p bu0/ijz -k4ad its:

  00.01: As a wave movj8nw t*i6pzb-zy7qc 1 es from one medium to a second medium with a different index of refraction which of ijy1 *z6z7pqcbn8 -wt the following wave properties would NEVER change?

  05.47: A sound wave generated from a t/:,hlzvv j/zt r hmjj u(.o)k7uning 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 sounhlzj(mvj/, rkt/ )o.h7uvz:jd as it passes from air to rock?

  14.28: A waterproof speaker placed at the bottom of a swimming pool emits a sounhh) lqg1v:s3i-f+cg:s2 ctkk d wave that traqsk1g:hf3lgvk 2 hctc+s): i-vels toward 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 wj5e(a yo/kl(v/6b oe xhite light strikes a rectangular glass block with an angle ofjo5kx /6 l(e/ybv eoa( 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 point P on a boundary v++ s ua9a ol9pz357osgn,h yqyxp 1j4as shown to the right. Which segment best replo4+jq9s+ah3 yys ppa7 nuv x 9,z5go1resents the refracted ray?

  98.17: Which diagram best represents what happens to a :ihizs 9h.f5 h;q3rt h 33koxbray of light entering air from water? 3bht3ih.okq ;rx9 shifh:z35 Air is at the top in all diagrams.

  94.11: The critical angle of a material is the angle of incidence for which 0g0mibghb9 zduhlg .f+*u -4ethe angle of *.l4e- 0ghuub0mfdi hg+ bz9grefraction is:

  95.12: The principle underlying fibe wwf5-k2goik 7r optics is:

  98.36: The critical angle lb29nse: wcg6in a 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 an index of refractio.pofl5ds (sp4c n*lx, ;n9hzh n 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 light in materiall4ho n9lns; .p*f zphdx( s,c5 X?

  03.15: A jeweler can distinguish between a diamond andpa 78/u7 i5kkometqewur(4d g) ai8 q5 a piece of glass by observing the critical angle of the light in each material. Glass with an index of refraction of 1.52 has a critica5eo 8a(k7qq w/idug7um4 ra ie8p 5t)kl 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 an an1giw+f.ja6j) yqm81rv0qv dn gle of incidence equal 1 ym.fr nq0w6ja81vid+q gvj)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 u n9.s8hv.ym /q65 d4pisuxwo of refraction n. The laser beam emerges from the material and hits a target. See the accompanying figure for the po5 xmi 64./ps8uws h.yvud9 qnosition parameters of the laser and target. The value of n is:

  95.31: A beam of light pas stsui:3 mby)8ses from medium 1 to medium 2 to medium 3 as shown in the accompanying figure. What is true aboutmi 8ustys:b)3 the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to med 5- rwt(ki jlhf70p6iygmv:4yium 3 as shown in the diagram. What may be concluded about the three indexes of rej :mfk ipiy7twl( r 564v0yhg-fraction, n1, n2 and n3?

  97.24: The accompanying diagraq+k*peabdfe x9+jpx.9h -o d/g 1g *gum shows the path that a light ray takes passing through three transparent materials. The indices of refraction in materials 1, 2, and 3 a*xee9xbgoa-hq kp+p 9g+ 1f *djud./gre n1, n2, and n3, respectively. Which of the following best describes the relation between the indices of refraction?

  09.34: The diagram bo fdjz. 1 *9iynczd/5 v wm9(xst:9gofh/0oem elow shows the path taken by a monochromatic light ray traveling throg1x yf/od 5dze9 hst.joiz 9f(ownv *c9mm0: /ugh 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 travelr8g/xa (*j,jj uqmcl1eui)) zing 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 suipy)-6;5 iy s8keszo grface of a rectangular block of glasg8eizs;s) y6pi5oyk - s at 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 wavev: vcqz:.(;u+t ivf r mo7fxo0length 600nm is transmitted from air into a piece of glass. Which one of the labeled arrows best in+ooc 0t; uzi(vq.r7f vv:: fmxdicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters the right-tr*aiwis96nkwatj*+gzf p1 i2 1iangular glass as shown. The glass has an index of refraction of 2.00 and it is surrounded by air. Which one of the letters j1*ak69a1nf+i*wpw i 2tgiz ed rays shows the path of the light after it exits the glass?