11.24: Two wave pulses travel to the rqh9ilg7c-3 h:( y stmwight toward a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best repreqh(liwc t3-9gys :h m7sents 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 s mqn+-7rz fly-urface of a plastic block. Which pair of statements correctly describes the phase changes folr y-f m-+zn7qr the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward through the point o5eydsq/snp,)7- zr h labeled B in the diagram shown. The ray reaches a flat mirror planoy5e/ )- rps7qshzd ,ced 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 ino 9haz0.icb b8cident on

  05.18: A student hold a hand mirror to observz0cu rd5j4u5x bz*k0 qe 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 the hand mirror 1 ft behind her hc0 5urk qz5uxbd4j*0zead, she will see the back of her head how far behind the wall mirror?

  14.25: It is observed that a light ray changes directionuz)t*z m s.a2d)acgp:bs c48s when it enters a new material. Which one of the following choices is the term best asso)tg zuz* d2macb.)s p8sc: 4asciated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wa r bp r5helhr8a:9rs-y)s-ff/velength 400 nm in a transparent material. What is tr5ysr8 hbs)e h lpfar-/9rf-:he index of refraction of the material?

  98.04: As sound travels from sj/70vt1gq vt:4nlwe 6 6xl.dsr- ezd gteel into air, both its speed and its:

  00.01: As a wave moves frce w6k4- ew1:cjod3be om one medium to a second medium with a different indexb1c -:w ecje6doe34 wk of refraction which of the following wave properties would NEVER change?

  05.47: A sound wave g:y4yer-ipv-/ e ltxcujx 38.g enerated from a tuning 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 tr4i/u- e: pgel3. yjycv- tx8xhe sound as it passes from air to rock?

  14.28: A waterproof speaker placed at the bot(cv;f *f hpul5tom of a swimming pool emits a sound wave that travels toward the surface of the *vp;f( lfhc 5uwater. 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 rectangular glass bl6v gizh h/x21lock with an angle of incidence of /vhxzg6l h21i $0^0$. 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 showgod)v:14pci ov 6 ez+bn to the right. Which segment best rep4zp1e:+bv gvicd oo 6)resents the refracted ray?

  98.17: Which diagram best represents what happens to a ray of light enteringpg-f n/rn1b4 7t +sewy air fry1s e wn7+4-pn/tgbf rom water? Air is at the top in all diagrams.

  94.11: The critical angle of a material is the angle of incidenky,y/ tj h6b2rce for which the angle of refractiy, /r26 tkbjyhon is:

  95.12: The principle underlying h )7ggz/y ujyf(e ,et htd(h,.fiber optics is:

  98.36: The critical angle in a transparent substancth8wqkd v lz,. wr+x1)e 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 z:paobwe*f,fnw-v. g2tu jr uz3.l41 = 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 lighf wzg4jz*:13rb oe, .v-lw .at 2uunpft in material X?

  03.15: A jeweler can distinguish between a diamond an i4cgi:*:fpksh,( 4w n9 awxynd a piece of glass by observing the critical angle of the light in each material. Glass with an index of h *w9,: xgf(4ap c4wi i:nnskyrefraction 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 y qzx;ma7whsp5)ay / )material. When the light makes an angle of incidence equal toqa m/xy; 7 h)wza)y5ps $30.0^{\circ}$, 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 u ,mk3u n,+bm+rvtwrm y(/q c.laser is embedded in a material of index of refraction n. The laser beam emerges from the material and hits a target. See the ac ub,mq yc3t+m(ur+.r n/vmwk,companying 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 23 dugc,,1hgahkr6c fto medium 2 to medium 3 as shown in the accompanying figure. What is true about khfchg ,2 u,c6drg31athe respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to medium 3 3 c35-osy+ezdxkx/fzh 9 :k mmwe0)atas shown in the diagram. What may be concluded about the three indexes of r )a +3m 3o zyhew0z:t/c -59xksdfkxemefraction, n1, n2 and n3?

  97.24: The accompanying diagram hiqh4q1flyfc:i6 *h( shows the path that a light ray takes passing through three transparent materials. The indiceq4i:ifhy qh(h fl16*cs 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 monochr1 :vb8jeouj 5womatic light ray traveling through three media.Thvj 8jwo:b5 u1ee 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 --pj w-xd7dsssbx/ s/ 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 scyo3-tno,hig 2n w.p-gf (+sn urface of a rectangular block of glass at an n(.2oh pyoctg ignw3-f - +,snangle 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 transmigrj4 scoe)au022 zxzk. v)/ac1;itpj tted from air into a piece of glass. Which one of the labeled arrows best indicates the path of the l2jax)4.;j1v 0cs/ut 2cp )oakzg zeriight ray after it enters the glass?

  14.44: A ray of monochromatic light entoenys f68akj,-0 fo j9ers the right-triangular glass as shown. Theo0oafef n9 jy k-sj6,8 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 after it exits the glass?