11.24: Two wave pulses travel to then am1jiijahr2+ 0. fs.1ark(p right toward a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best repr(1arrs h.ajmj naf20. +p1 ikiesents the superposition of the pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes through tv gmu f*4pb3)phe air and strikes the surface of a plastic blocp4fb)ugpmv 3* k. Which pair of statements correctly describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward hq6yrp5b(x 5)kw5ww qthrough the point labeled B in the diagram shown. The ray reachephbx5w5 6) yw(5wr qkqs 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 oc(0;( i 3*+zb ookdotfabvb lb*curs whenever light is incident on

  05.18: A student hold a hand mirror to observe the back of her ffxvp d 9y.3d5head 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 xf.yd f 9vp3d5wall mirror?

  14.25: It is observed that a light ray changes directiiay7d /,x6m gm we.h1son when it enters a new material. Which one of the following choices is the ter7yi/,ms.e w16m a dghxm best associated with this phenomenon?

  96.19: Light that has wavelen9vq b(9+bl9 mgyfh m+ygth of 500 nm in air has wavelength 400 nm in a transparent9ghf9vy l9(m+bqm y b+ material. What is the index of refraction of the material?

  98.04: As sound travels from steel flbw0 0o 7cita1 ewc d08 pkjt0)2 qwtz7x:q+sinto air, both its speed and its:

  00.01: As a wave moves from one medium to a sevxkc4 sl*wt /4+xkq+s cond medium with a different indextsk +4/sxlw4x vk qc*+ of refraction which of the following wave properties would NEVER change?

  05.47: A sound wave generated from a tunin1 wi v3kgmo5t-nwj2i1 dlv)8 h70vkgbg fork of single frequency travels from air (with speed of sound 340 m/s) into rock (with spjb5itvw 8v7mi2 g lo1gw1)k0kd3v -nheed of sound 1500 m/s). Which statement is true about the wavelength and frequency of the sound as it passes from air to rock?

  14.28: A waterproof speaker pl.21xgv o1krutae (gm:ilv; 2y aced at the bottom of a swimming pool emits a sound wave that travels toward the surface of the water. In the water, the soun a21k2xemgrtig:vyv.; l( 1 uod 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 wqiufvs my8u(dax 8o 7o./-8eh:+pm trectangular glass block with an angle of incidei f8tem:a vqos(u87o /u8d.-x +mwyphnce 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 ol6 25ntxft263 g wneayzx cn:;n a boundary as shown to the right. Which segment best represents the ly;3 tw 5:ez6c6gfxtna2nxn2refracted ray?

  98.17: Which diagram best represents what happens to a ray of light ; od6k mhzi, bpzh:x+9entering air from water? Air is at the txiph m;,odz 6zh +9kb:op in all diagrams.

  94.11: The critical angle of hsrf jl/k4ywn1s:.a: a material is the angle of incidence for which the angle of refra/r4:ss .f:n1kjl yawhction is:

  95.12: The principle underlying fiber optics isx8; y1 xw.zpar:

  98.36: The critical angle in a transparent substanh ad t+dy1,u0wce 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 withn +opjsmy4qp:a ya /(k.ndy 19 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 lightd9 o(pnma. 1a4yj:q /nkyp+y s in material X?

  03.15: A jeweler can distinguish between a diamond and ny00, g5bm z.2lwzkmb/omw e 6a piece of glass by observing the critical angle of the light in each material. Glass with an index of refrac26w5kzw.l,ombn 0bemm g 0/z ytion 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 makes an ado)wt.0 x p op3h.gq2oc-x7bmngle of incidence hgmw p-p)o 2q dt.xcb 703xoo.equal 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) 53okn-*qpa l6r y q4zh6taol a material of index of refraction n. The lasey aanlzo46p*l)3kr5t6 hq o-qr beam 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 from medium 1 to mediumobwqs3ydb5+m:zvj0 br :9pi , 2 to medium 3 as shown in the accompanying figure. What is true about the respective indices of refraction (n1, n2, and no:+ d 9p:bwyq3ms bb0 5vjz,ri3)?

  00.14: A beam of light passes from medium 1 tno5a8f-:hrk9jdspc1 ad4 p63 *h/ tnpoom +smo medium 2 to medium 3 as shown in the rmo5kdfoho d*t93p8 + :spjs-1nhcnap4/m6a diagram. What may be concluded about the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path t f4v5tl38fjgy hat a light ray takes passing through 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 b48fgf 3ytlv5jetween the indices of refraction?

  09.34: The diagram below s) lwer680m -l4wvfvvlhows the path taken by a monochromatic light ray traveling through three media.The symbols8-0w6wvv4 mlev llfr) $v_1$,$\lambda_1$ , 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 glase5c5f ayccu.8g i sp,3np0a5k2l ima *s ($n_g$=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 su ld6vxr4j-:b /qkb+qvrface of a rectangular block of glass:bv- / qrv dl46xkqj+b 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 wavelength 600nm is transmitted from air into g1. ahu (x/cqga piece of glass. Which .x gc1ha /uqg(one of the labeled arrows best indicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters the right-triangular gld (2m)3lfo mz*qf -svuass as shown. The glass has an index of refraction of 2.00 and it is surrounded by air. Whqmmv sold z)(f3* u-2fich one of the lettered rays shows the path of the light after it exits the glass?