11.24: Two wave pulses travel to the right ) .eyx4 4dwywke /roli2dgl k6i60v/ z toward a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfek0zi)4lxw62 g/yie.w 64dyld/ rvek ore. 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 thro )3lcfq63+uyfc i2cuoyp jn73ugh the air and strikes the surface of a plastic block. Which pair of statements correctly describes the phase changes for the reflecte io cc73p ly3ny+c32fuq jfu6)d wave and the transmitted wave?

  12.02: A ray of light passes straight downward th /g, 9xeimq 8z/vb9bkurough the point labeled B in the diagramgm8bu/q9x/bi vk9 e ,z shown. 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 whenever light is v4jw 7siz2*flrh4r 7n1yr5j zincident on

  05.18: A student hold a ha;z8m2/ hi ;2 zd8qoz m4pnxe:tuyf,i gnd mirror 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 tmq: g2iythxun zz8mz e ,;o4;d2i/8f phe 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 direcrn2 /p6 n*gvpztion when it enters a new material. Which one of the following choicervp 62nn/p*z gs is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavelen- 7he/t )pxexy92fhafgth 400 nm in a transparent material. What is the index of refraction of the mate 7pf te/xay92hh)xf -erial?

  98.04: As sound travels from steel into air, both its speed and its: :o)rwj,ejr1tty, -ce

  00.01: As a wave moves from one medium to a second med3i tvh0so/xzphzp + /hdsm04;ium with a different index of refraction which of the following wmv+p/s3pihh 0 o/dsz4xt ;z0have properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of single ,q( aja4rl j8bfrequency 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 wavela q4(jrbaj8,length and frequency of the sound as it passes from air to rock?

  14.28: A waterproof speaker placed at the bottom of a swimming pomr:q/7hjutj 7ol emits a sound w 7hmj:j 7/utqrave that travels 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 white lighby*p7mqc6 q3 bz6jhw;zvq, r nl0-0i ft strikes a rectangular glass block with an angle of incidz6p fnrjy 7 ;0qh,6 vciqz*blw q-0m3bence 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 as sh -*8a4n;2jlqov i+h(seo au daown to the right. Which segment best reprun-dohloj ( vaaq+se*; 4i8a2 esents the refracted ray?

  98.17: Which diagram best represents wi+um s 4tf0dp*m3u/c oboih)3hat happens to a ray of light entering air from water? Air is at dum0oti* hbos)c mf4up+/3i 3the top in all diagrams.

  94.11: The critical angle of a material is the ang/ qh f2zx(fe ,mz :z u+-habla4br13fm midb0+le of incidence for which the -m l(hauxfzb+21:z i4bb0 mfh a +fed3r/zq,m angle of refraction is:

  95.12: The principle underlyinnz-2r /er ut9mg fiber optics is:

  98.36: The critical angle in a transparent substance surroun qj )5jsylyr8p+) (k;a5kth gzded 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 ;+exnn )or6 j*f6ezpgwith an index of refraction of n = 1.5 to material Y with an index of refraction of n = 2.0. If the spn*6) pg e;fxzn+re o6jeed of light in material Y is v, what is the speed of light in material X?

  03.15: A jeweler can distinguish between a diamond and a -b * de fm9gf4b*lonr,a6n-nt piece of glass by observing the critical angle of th -*nflbfe 46*dogn,n9bmt- rae 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 th8i9r7 r*hen n/qj v5ize light makes an angle of incidence equal n98rn5z ir7jqie*/hv 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 embedd yzy5tl b/kz+*ev1fn/ed in a material of index of refraction n. The laser beam emerges from the material and hits a target. See the accompanying figure for the position paramzyvk+5be/t* z /l1yn feters of the laser and target. The value of n is:

  95.31: A beam of light passes from medium 1 to medium 2 to med9ysl/vgm qpqa8frij yuetez9 0 79:);ium 3 as shown in the accompanymq sze7yq/atl:igypvu f09)9 r e8 ;9jing figure. What is true about the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to medium 3 as shown ir(aha su94n-ql,ozm :n the diagram. What may be concluded about the three indexes of refraction, n1, nu9z almoq: ans(r-,4h2 and n3?

  97.24: The accompanying diagram shows the path that a light ray w1ws: -l3kgqotakes passing through q1:s k3ol wgw-three transparent 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 path taken by a monochromatiwday8wb4;+ s7 c5uken c light ray traveling through three med+ wy8wubn ; ec457skadia.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 my5 mbe-y73y3yp(ttt 5ovx6 sro.+dq traveling 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 a v+(ys.lp:ng rectangular block of glass as (v+:gal pny.t 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 wavelengtx6kif;: usj-o h 600nm is transmitted from air into a piece of glass. Which one of the labeled arrows best indicate; i:xj 6ksuo-fs the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic d-bfa xn+w o5-light enters the right-triangular glass as shown. The glass has an index of refraction of 2.00 and it is sudf-a + nwbxo5-rrounded by air. Which one of the lettered rays shows the path of the light after it exits the glass?