11.24: Two wave pulsese)toh p2 m)0cg travel to the right toward a rigid boundary as shown. After reflection of the triangular mp)c0o )e2t ghpulse, the pulses will interfere. Which 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 the surface of a p /+olpqek+:mr lastic block. Which pair of statements correctly describes the phase changes for the reflected wr+ok+l pmq: /eave and the transmitted wave?

  12.02: A ray of light passes straight downward throughrl vfr uvmo00 or7)3f4 the point labeled B in the diagram sh)ouf7 mr ofv0r34lv0rown. 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 o7o(nh lj8-zm eccurs whenever light is incident on

  05.18: A student hold a hand mirror to observe the back of her he1(olcqmafv. 9ad 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 behind the wa c lf.o(aqm1v9ll mirror?

  14.25: It is observed that a light rpl40j iudo jc,*( w5mtay changes direction when it enters a new material. Which one of the following choices is the term best associated with*l u,jm4w5dc o(pjit0 this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavelength 400 nm:teo3a v5cr i4 8b2slvdsw*5 7m7clne in a transparent material. c2 v5 5b sw ll7*8vcsa4m:3etei7nodrWhat is the index of refraction of the material?

  98.04: As sound trave5j0u gflth9+q+c1; r hay1srm ls from steel into air, both its speed and its:

  00.01: As a wave moves from one medium to a seco )rb7k+2 oslwg31 glawnd medium with a different index of refraction 1 baslgg72w+l3w)okr which of the following wave properties would NEVER change?

  05.47: A sound wave generutk*31 bpujq8y*7 hq lated from a tuning fork of single frequency travels from airb7u pljku 8hy13 qtq** (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 the sound as it passes from air to rock?

  14.28: A waterproof speaker placed at the bottokjt +-+4(6uykg- zx.zicrgqb m of a swimming pool emits a sound wave that travels toward the-gcuxr g -zj4kq(z6i++bt ky. 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 ou+g :dopvh(kfe 4 q z1,g660(uhzjcocf white light strikes a rectangular glass block with an angle of inciden+cfk(gh qouz 6ju01,dpec(vhg 6 z4o:ce 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/oz; 1cn t 5yb/tikiw0 as shown to the right. Which segment best represents the refracted ray?bc 1 it//;nyi tk5z0ow

  98.17: Which diagram best reprexu w:z4kb +08jwbou1fsents what happens to a ray of light entering air from wabfj+bzou8k 0 uwx1:w4ter? Air is at the top in all diagrams.

  94.11: The critical angle of a itp v1lf;4h 7/afs.6etde-rematerial is the angle of incidence for which the angle of refract-ftarh. df iv /e6 7;etpels14ion is:

  95.12: The principle underlying fiber opti1o29s9v xwmhxk2kbxbp 1 x91ho)st la) nq47jcs is:

  98.36: The critical angle in a transparent substance s848sm7* b 3xtydiido dj8mo p6urrounded 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 matej gv d0/i8krxaqb55 +irial X with an index of refraction of 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, what is the speed o05q8 gkraijd /bi +vx5f light in material X?

  03.15: A jeweler can distinguish between a diamond and a w 3dns q c-u9ccq3,k/bpiece of glass by observing the critical cw3qnqc/9dcu3b - k,s 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 clear material. When the light makes an angln;w5 lk tijg1.e of incidence eqg lw;ik5 t.1njual 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 embedeugjf a+ x7d4 5vmc-4/p df.oided in a material of index of refraction n. The laser beam emerges from the material and hits a target. See the accompanying figure for the position j-ufpdo d44a7.xi/+5fgevcm 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 mediu uu u/ l:h3bo+j3brvc3m 3 as shown in the accompanying figure. What is trlo 3buc3u/ buh+3 :jvrue 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 xlegk0gd g f11))ms,mshown in the diagrx m g011ldfsegg)km, )am. What may be concluded about the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray takes p. )/-r(qfs lyiu4v.0xx rzgsvassing through three transparent materials. The indices of refraction in materials 1, 2, and 3 are n1, n2, and n3, respectui(xf .x/r -v 40)lyq.sgs rzvively. Which of the following best describes the relation between the indices of refraction?

  09.34: The diagram below shows the path taken by a monlrf)t xf)tq7zl: j5 o,ochromatic light ray traveling through three media.5tot ,llj:)r 7xq)ff zThe 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 travpaei m4 q0dcv.qp+/4 feling 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 incidentj +f-w*yc n6ro27r yvw on the surface of a rectangular block of glass+rv7cnr6 fywywo-*j 2 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 fros3nd-0l*d a b5l1 / vtou.wbysm air into a piece of glass. Wl501 snobyddv . 3/lsa-b*wu thich one of the labeled arrows best indicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light m ,i2 j7giw ayf6ml.y8/n;arr yi5.ox enters the right-triangular glass as shown. The glass has an ,.aix.r 25j7y ir6/ywia;gnmm8 fylo 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?