11.24: Two wave pulses travel to the right toward a hu 2 wig,m:+rrrigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best represemg+2iwhu r,:rnts 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 surfac f*zq *va 1tumbe(zb: mi:0:kue of a plastic block. Which pair of statements correctly describes the phase changes f: :fvmzbe*kztqu u 0a1i*( m:bor the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward throu9 1z3( bv) syf - 2m99zcyajwdtbs)uozgh the point labeled B in the diagram shown. The ray reaches a flat mirror 3 zy1d)a-9(2yf mtw9vo sbubcs )zj 9zplaced 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 wheneverp 0nj7w/cqf ytnlj09ysj glz 6h x06*7 light is incident on

  05.18: A student hold a hand mirror to observe the back of her head whio(im- j i)*u3apwpf0ile 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 u fp(0 wma-*iji3ipo) of her head how far behind the wall mirror?

  14.25: It is observed th (lwhgeet 1jhrm82j95at a light ray changes direction when it enters a new material. Which one of the following choices is the term besthjme2h981l wre(5tj g associated with this phenomenon?

  96.19: Light that has wavelength of 5+lyt h-t ltm,kb ,72 z(dziu1e00 nm in air has wavelength 400 nm in a transparent material. -+1tl,2zti,tbmd luehzy7(k What is the index of refraction of the material?

  98.04: As sound travels from steel into air, both its speed and i6sow:2 bo,v yuts:

  00.01: As a wave moves from one medium to a second medium5hah; vn/ z ut-u*- 11r89mbn mtbtrlr with a different index of refraction which of the following hb uztrv r5ar-*/11t-u89;htmn nl bmwave properties would NEVER change?

  05.47: A sound wave generated mo3 sam)bo w, ynrpr, ,0u:kb+jbz j:(from a tuning fork of single frequency travels from air (with speed of sound 340 m/s) into rock (with speed of s (pm:n3r ur bk+: )0zajj,bom,sy,bowound 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 placed at the bottom of a swimming pool emfy 32ub2dy29:kb o iqdits a sound wave that travels towabou9y2 2kqf i2yd bd3:rd 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 rectangular glass bvplgy-e9/nj1 e axx27g5p ts*lock with an angle5pp 9ayseev 1x2-g* g tj7x/nl of incidence 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 on a boundary as 747krkgz g pt.8jjs*aowrw6(j2e5cw shown to the righr7etpw8j *j 7.cg(45ozwkr2wgaj k6st. Which segment best represents the refracted ray?

  98.17: Which diagram best represents what happens to a ray of light enttg/jng7g( * di orp-9zering air from water? Air is at the top in all9d-r 7*zntgjip (/g go diagrams.

  94.11: The critical angle of a material is the;v tb9 8s.pah: a-fcuf angle of incidence for which the angle of refraction isc ut.v:bs pf 8ah;a-9f:

  95.12: The principle 9up -w.iu0rxyunderlying fiber optics is:

  98.36: The critical an4 de1zjfh k*-hgle in a transparent 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 of n = 1.5 to -/ omn)plwn, :mlsf6ye p*wv hh .z0p0material Y with an index of refraction of n = 2.0. If the speed of light in material Y is v, what is t6hl0es0 npwlm nho.:yp*m / -z,vwpf)he speed of light in material X?

  03.15: A jeweler can distinguish between a diamond and a piece of 3/fkk5zo3 srj2ztun* glass by observing the critical angle of the light in each material. Glass with an index of refrac3o3kskjn fz*r z/ 5u2ttion 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 mater* ep(y g z7eowls0/vm(qst( a nmg/x2+ial. When the light makes an angle of incidenct(v0*7l ssqn /gop(ex2 amzm/w(+eg ye 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 indeua gmq5(1tfg:x of refraction n. The laser beam emerges from the mat(uqga 5f 1:mgterial 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 mediu1 c vt w:2b4r/eh/dajjih ky:8m 1 to medium 2 to medium 3 as shown in the accompanying figure. What is true about the respective indices of refd/8r:k vjt:hya jbhi /12w e4craction (n1, n2, and n3)?

  00.14: A beam of light passes f3 s fzj)q.v6gtrom medium 1 to medium 2 to medium 3 as shown in the diagram. What may be concluded about the three indexes of refrac3zj.sq6ft) vgtion, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a lightys zc*nbb0gmjo8yo36g;z1b* ray takes passing through three transparent materials. The indices of refraction in materials 1, 2, and 3 are n1, n2,n zy*czog*oj6b8;myb gs 01b3 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 rayez(r wkm)i -evy -x43f traveling through three i-m(w3fv4z x -r)e yekmedia.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 glas yr2x4sez btpig .* nk, 4a;n3ccwtj()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 surface of a rectangular3vi x* jae6apwnww 7(**qmmg 4 block of glass at an angle(mi*xw6q gav nj3w m*a4*w7pe 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 a piecevvkzg)-vl gp(-u/*az of glass. Which one of the labeled arrows best indicates the patz) lv(ug--/vp zva g*kh of the light ray after it enters the glass?

  14.44: A ray of monochromab zd -n /obu9s0u7pev6tic light enters the 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 rdnuu6 7o-s/0e bbvpz9ays shows the path of the light after it exits the glass?