11.24: Two wave pulses travel to the right toward a rigid * xh6h(etz 7h0iqt7lx lgs6:z boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best tgs:xhhi76*lzh6qz7t(l0ex represents the superposition of the pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes through the air w36ieb dqcz) cvug93 mn 15f*dand strikes the surface of a plastic blodizgb3u6cvdqf ew 9ncm *)3 15ck. 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 throug1bhdmm m4xut6e 7a q4)h the point labeled B in the diagr14bq7tm deum4 6ah)mxam 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 va +l0;;n,:jy pfpqhl7 ykk0lu 15lmaoccurs whenever light is incident on

  05.18: A student hold a hand mirror to observe t/a*0r zn:zk myw-0 xp:lfsz7the back of her head while standing in front of and looking into a wall mirrzatxlrz nks 0/0 p- mw::y7fz*or. 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 light ray changes direction when it ( 0v goq5crip6enters a new material. Which one of the following choices0iop5(grq c6v is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wav-vss punek ) h10 e;g.7ksvjy---bt wpelength 400 nm in a transparent material. What is the inuh.se- 1vg ;-tkev)0bs-7yns - pj wkpdex of refraction of the material?

  98.04: As sound travels from steel into air, bot0 g opv/s9d 4tp,s:nzmumbs- +h its speed and its:

  00.01: As a wave moves from one medium (nr3l eo1 ujeo6oof 48b,c 6jdto a second medium with a different index of refr4 nr f,(j61cudj eoe6 bl3ooo8action which of the following wave properties would NEVER change?

  05.47: A sound wave generated from a torhq z ;(n,gi.uning fork of single frequency travels from air (with speed of sound 340 m/s) into rock (wn .rq ;zigoh(,ith speed 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 speartbi jn 3 )d9c4ahfn,+ker placed at the bottom of a swimming pool emits a sound wave that travels tbhn+ d4),an9 ti3fcjr oward 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 ligh25cq wb3tfzie5 xdijz (l,o3pw.43ngt strikes a rectangular glass block with an angle of incidence of n p 5 zq3iio.3x2fj zl3cwt(e,bdw5g4 $0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of light i4 vud7u+w8nmf s directed toward a point P on a boundary as shown to the right. Which segment best represents the refracted wud 4 mn8+f7uvray?

  98.17: Which diagram best represepoz/x 7l)qi (hnts what happens to a ray of light entering air from water? Ai7o(xlh)qzp/i r is at the top in all diagrams.

  94.11: The critical angle of a material is the aic 6/fgj+.32 ebdezz vngle of incidence for which the angle o.d/v+ b3zec feg2zij6 f refraction is:

  95.12: The principle underlying fiber optics is:yga, zqc 8h-2m1p+f 0,(mtk:u ikq jya

  98.36: The critical angle in a transparent substance surrjy (hij0 n5e.42p dtnyounded 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 reft3 ;n pqb,nl9fraction of n = 1.5 to material Y with an index fb,pq3 t;nnl9 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 distinguish between a n sz5wvi )n4u)diamond and a piece of glass by observing the critical angle of the light in each s5vznu))w4 ni 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 cle8oel 93 ysty/har material. When the light makes an angle of incidence equal toh y8oet 9s3l/y $30.0^{\circ}$, 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 index of r8+b 3jbtx6qg7 -xq)vr28 ts0mgiz encefraction n. The 703-nt8jz)gv cbx 8rqg it2m6+bexq s laser 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 medr2x i2k9yf.o/ uwsexoch 1zr5c5+m :tium 3 as shown in the accompanying figure. What is true about the respective indices of rexe xc2551r/ zoy.s9fr+ i2tuok:wc hmfraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to medtgybu;* af *q:ium 3 as shown in the diagram. What may be concluded about the three indexes of refraction, n1, n2 and n3gy;*fq*a : utb?

  97.24: The accompanying diagram shows the path thtvyqoqjg* ke g:-w *,(at a light ray takes passing through three transparent materials. The indices of refraction in materials 1, 2, any*q*qg we,jt ok-(vg:d 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 monochromatic light ray tr vhmw 0r/a;di 5tmaw7)aveling through three media.The symbo)at0 w5w7 amvdmih/;rls $v_1$,$\lambda_1$ , 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 trsq 5*qja2 skge(i+7 lwaveling 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 rectawxkv s/90;uncngular block of glass 9nv /ux0wck s;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 t6sp;df*s ,f n.u cxcw(cjf6m5ransmitted from air into a piece of glass. Which one of;jfpmn* d , .f(wc6f65su xccs the labeled arrows best indicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters th 0(s1:en5mnyqwj qw/n4iwqe, e 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 afte:qnw/iw4qsn e(jym5, 1 nq w0er it exits the glass?