11.24: Two wave pulses travel to the right toward a rig 3ljfniq29tjx9 2l1a t;efgl1id boundary as shown. After reflection of the triangular pulse, the pulses will interfere. 9i nf2j;jq 1l2fa3l xge1t lt9Which 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 and strikes 6qsi+rxgc*l9the surface of a plastic block. Which pair of statements correctly describes the phase changes for s9c+ 6i gx*qrlthe reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward through the p6 giwoa 96-v3+e codk qndn0v*oint labeled B in the diagram shown. The ray reaches a flat mir6c+iednd*-0 v v oqg9ok6naw3ror 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 whenevqm,9fwbckg:g: j z+ 3xer light is incident on

  05.18: A student hold a hand mirror to observe the back /c,-r:fclalo of her head while standing fc, cl:o/ r-lain 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 wall mirror?

  14.25: It is observed that a lig f2slz zu1+ sdtgmn5ne0b09 t2ht ray changes direction when it enters a new material. Which one of the following choices is the term best bsd229nltzs gen010 m5+tzuf associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in a 6nts d2j:odi- 42diotir has wavelength 400 nm in a transparent material. What is the index of refra2i4 n:t6ij2 ds-ddtooction of the material?

  98.04: As sound travels from steel into air, both its spee.zdbwh hkv9)zkw :e1.d and its:

  00.01: As a wave moves from one medium to a ser 3uv++fls )+9n0yfj nwe4tmfcond medium with a different index of refraction f3v 4y+nf+nt) + lsmuferw90jwhich of the following wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork o 9juyy k3m,4pf u4vkd1-d-kgr f 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 9uvum 4ykdrd31 p,j4kyfk- -gfrequency of the sound as it passes from air to rock?

  14.28: A waterproof speaker placed at the bottom of a swimming po9f1 a3,(m uujek (sjabol emits a sound wbu skmj,(13aeuf9a j(ave 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 light strikes a rupror,( lm 5 givr228eectangular glass block with an angle of incidence of r ou52l, eig( r8pvrm2$0^0$. 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 boundap2g;+hw 6g2m bc e)pn9vryvx/ ry as shown to the right. Which segment best represents y pbew gv/)gr26n2cp;+mx9hvthe refracted ray?

  98.17: Which diagram best represents what happq46pvjvlk 4/a ens to a ray of light entering air p/4jlq4a6 kvv from water? Air is at the top in all diagrams.

  94.11: The critical angle of a material is the angle of incidence f dqy-e+xy2z azoq, .:qor which the angle of refrad+e z q2yy.:az-qxq o,ction is:

  95.12: The principle underlying feek p gfse281)iber optics is:

  98.36: The critical angle in a transparen ra5l2 .c fwom c45d. dtxcgocvw/)7w(t 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 refraction oc8m5 b j9d upv;:22eauf kq*g1i il5kzf 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, whazjmc5u ip2 d 9ea2f vl:i kkq;*5ub18gt is the speed of light in material X?

  03.15: A jeweler can distinguish between a diamond and a piece of glass by obec es:( mvj93bserving jc9vme: (es3bthe 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 csc 5 wwbfio2m+mg;* f.lear material. When the light makes an angle of inc 2* wfi ;sfc+5wgm.bomidence 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 a material of in/x *7hsi5ekbidex of refraction n. The laser beam emerges from the material and hits a target. See the accompanying figure for the position parameters of the laser and 5hk i*ie7/bsxtarget. The value of n is:

  95.31: A beam of light passes from medium 1 to mjn./v c4n 1snsedium 2 to medium 3 as shown in the accompanying figure. What is true about the respective is1v. njns4 /cnndices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to med)mfxp a7qxl)7ium 2 to medium 3 as shown in the diagram. What may be concluded about fa)xm)ql 7 p7xthe three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ra;zx ey6e hsq00hgj6 t3y takes passing through three transparent materials. The ind0hjy; x0qtg6ezs h63eices 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 shoi.k x:xghwy,wq ue ;:+ws the path taken by a monochromatic light ray traveling through three x:;y.+uexkw:gw ,qh imedia.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 trlx ,zh*7uzn*nl*,dql*cy:s eaveling 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 onys03zjd-ek22j 8kxyv5rwnu * the surface of a rectangular block of glas vdr j knkejy8xuz w*20-53s2ys 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 in cdd8ihqkl1ys z/z s 5j.-nwm c0c8*e/to a piece of glass. Which one of the labeled arrows best indicates the 0n8qmyslc/ cj -./81i zk 5szweddhc *path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters the right-triangular es95r ej9p bw8u(;+qowh .jzi glass as shown. The glass has an index of refraction of 2.00 and it isw;ibe.qs(uz9j 5+pworh9e8j surrounded by air. Which one of the lettered rays shows the path of the light after it exits the glass?