11.24: Two wave pulses travel to the right toward a rigiwdd y9v+7:wxld( 73wa b zvud6d boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which onddyzdw6: +(9 7 x uvvawwbd7l3e 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 the surface of a:c njdqa6 .sk6p(u4vo plastic block. Whica.d:kjsqp nvu 664c(oh pair of statements correctly describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light pxm-gcrd:ks0 z7 n,f x w9j,rpny;+x)sasses straight downward through the point labeled B in the diagram shj -)rx pnxr,mfd9gs,c7s:nyx; 0+zwk own. 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 i(l0p 9+ ;zowl,co1snts wle3xs incident on

  05.18: A student hold a hand mirror to observe the b63wx 0n gkxck9r+l* snack 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 back of her head how far behw *ngx k+039lkxcnrs6ind the wall mirror?

  14.25: It is observed that a light ray changes directz022 zpn:*wx k8ntxd tion when it enters a new material. Which one of the followingptt0z z2 2nd8 n:xx*kw choices is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in ai b// h1 qzw81l:i(n/ijycdjdhr has wavelength 400 nm in a transparenn1h (j di/q/:1cwybji/l d8h zt material. What is the index of refraction of the material?

  98.04: As sound travels from stee5rd(o:a1 k;ymqemad3 l into air, both its speed and its:

  00.01: As a wave moves8 f s1t wysy+c3pzlafwuh1(), from one medium to a second medium with a different index of refraction which of the following wavew1 lp,h+s) yusfy t1 3wc(zfa8 properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of single frequency tdfs1yq4 ji7 e)n6z 6auravels from air (with speed of sound 340 m/s) into rock (with speed of sound 1500 m/s). Which statemen da1)fn76sijq z6ye4ut is true about the wavelength and frequency of the sound as it passes from air to rock?

  14.28: A waterproof speaker placed at the bottom of a swi5qcpn:);b9k/c *iy9rtikb hs mming pool emits a sound wave that travels toward the surface of the water. In the water, the sound wave has a frequency ); is9qiy bck:*/ t9pc5rhnkb $f_{water}$, 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 x9plf2l,+ b5ajw )-qhz5hwc ya rectangular glass block with an angle of incidence of x9 jw +lp25aw5-qbh,f zy) lch $0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of light is directed toward.i.m oniv :dwmoq66(q a point P on a boundary as shown to the right. Which segment best represents the refracted ray? qqw6o:6vm .i(io. mnd

  98.17: Which diagram :t6(y6h z f4m bfjeie9best represents what happens to a ray of light entering air from wfehm f4bt 96j ei(6zy:ater? Air is at the top in all diagrams.

  94.11: The critical angle of a material i0+pxv3;c z zds xgk2f5s the angle of incidence for which the angle of refraction i +gx scx;v 2p3dz5z0kfs:

  95.12: The principle underlying fiber optics iso s.,k9wlt:d)dx a 0cm:

  98.36: The critical angle in a transparent su k-c8ypv1-eg vbstance 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 of n = 1.5+)j8 t6gqqe8 -yy b:dtbo y3cj7 qly*k to may 7:ogqj8be6b3ldqc*y qtj-8y+yk)tterial 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 material X?

  03.15: A jeweler can distingui2 69 0vmpclpiush between a diamond and a piece of glass by observing the critical angle of the light in each materiac6 l 0m2ppuv9il. 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 frt.7kc : (lc z,vz-d stubxf2w92:rko rom air into a clear material. When the light makes an angle of incide(x,ts7z zbd rfcl: 9u:k.t2c-kv o2 wrnce 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*uv,,; ybrbg lyc:ygx z q :ur0,l6ny/dex of refraction n. The laseyu ly6,,v ucyn: :q;g0/zyxbr,g r*lbr 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 medium 2 to medium 3 luhh,kzv9( j cam2(v+as shown in the accu(k l2cm9+ h,vjzvah(ompanying 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 ind(vcr,9u*d7e;jwsj f the diagram. What may be concluded about the three indexes of rdsf( ;7vdj rj*u9,ewc efraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the pa wgw8chpml wozq0,:x+ zzugvr6 1w248th that 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 g+ wl:,wh zxmw0p8cvr2 zo61u48zqw gthe following best describes the relation between the indices of refraction?

  09.34: The diagram below shows the path taken by a mi 2tqcp*o/ p:honochromatic light ray traveling thrtco2 qi: /pph*ough 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 glass (;a lwa13hjkm 5166 xq5fl; p zrqwe2:mmqq.lh$n_g$=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 rectangular block of glu - )mnzf0,ck ub;a6poass at anm) k;fzba,n0 c6uo -up 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 600n)7ylyx0p/+ qxf /faihm is transmitted from air into a piece of glass. Which one of the/f0p+iy )7 yx/aqxh fl labeled arrows best indicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters t g2k,k*bh pag9he 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 shows the path of the light a9,khpg bg2a* kfter it exits the glass?