11.24: Two wave pulses travel to the right to enc./nn0/l2ylm pxpq u5l2q4ward a rigid boundary as shown. After reflection of the triangular pulse, the pulses wilnqmecl p4lx5/qn n20l .pu/y2l 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 tmar1- b5l alyy4hy ng3- ;mi9strikes the surface of a plastic block. Which pair of statements correctly describes the phase changes for tl harm- 14tbyg ay ;imnly95-3he reflected wave and the transmitted wave?

  12.02: A ray of light passes straightmihpu3mn2m-e ,8vf 8l downward through the point labeled B in the dia, 8vmm- npe fuilmh238gram 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 reflec9,uub 0iy9-ibop u zxwc93kb 9tion occurs whenever light is incident on

  05.18: A student hold a hand mirror to observ wdf 90axi ip+iqty808e 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 hwtid8x8 +i0payf 9qi0 er head, she will see the back of her head how far behind the wall mirror?

  14.25: It is observed that a l6 ,wnie pf);)v eg bogdk0,c8,z.n icoight ray changes direction when it enters a new material. Which one of thcniwvn p;,go0 ,)ek.)c8efobg, d iz6e following choices is the term best associated with this phenomenon?

  96.19: Light that has wavelenbv)qh qz:u7uxu 1*m7t gth of 500 nm in air has wavelength 400 nm in a transparent material. W7utxb1 :7 uzvqhu) q*mhat is the index of refraction of the material?

  98.04: As sound travels from steel int3frlk(rq6w , uo air, both its speed and its:

  00.01: As a wave moves from-,l,)zgn ve lg(nj-j7 aia x9h one medium to a second medium with a different index of refraction which of the -evhaxl, -zn ( )a79gjig jnl,following wave properties would NEVER change?

  05.47: A sound wave generated from a tuq g;i jx71l7fqhpsl4w29o q+ening fork of single frequency travels from air (with speed of sound 340 m/s) into rock (with speed of sound 1500 mif hp q1wqj74g2e9 lx;olq7s+ /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 8);nk( e mb2+,ehlzkhx-ydrw of a swimming pool emits a sound wave that travels toward the ke8,yhb;kh (mnrzx+d)-l2ew 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 stsce1sg,+ s1ukrikes a rectangular glass block with an angle ,1+uesgcs1sk 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 :yzc *7fqxrou,n3x qdc b6 .d0as shown to the right. Whu n6xf .,*7o czc dyd30xbq:rqich segment best represents the refracted ray?

  98.17: Which diagram best represents what happens to a kbe i3c4n bq-3 ma0zz6ray of light entering air from water? Air is at the top i be6m c qzb3-z0ia3kn4n all diagrams.

  94.11: The critical angle of a material is the angle of incidence for whb6/e dx z,*r 5fhvjx.kich the angle of refraction ise/khzrjf *6 xd5x, .vb:

  95.12: The principle underlying ftm lcdu6nzp)be.na/ e6 (2v o.iber optics is:

  98.36: The critical angle in a transparent substance surrounded by a2f /m( wjj7ihsir 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 wit e 4m)mvo7re-ch 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 of light in mat v rmme)-7ce4oerial X?

  03.15: A jeweler can distinguish betw(p rp6r(qf)4iw vhm4p een a diamond and a piece of glass by observing the c pi (qfrp(mhrw4)6pv4 ritical 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 mate qg94eg5 ,obnhk;c.gq/id lz6p b3su 1rial. When the light makes an angle of ggezq1c ;l94./qs,6 kgh5d3bounpib incidence 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 ofn)1x05h6nxr hyxp pu3 index of refraction n. The laser beam emerges from the material and hits a target. See the accompanying figure for the position parameters of the laser and target. The valxh1)xp3yup 5rx 6nh n0ue of n is:

  95.31: A beam of light passes from mediuouuvuia 1fe x42 (luu;v:)ph.m 1 to medium 2 to medium 3 as shown in the accompanying figure. What is true p :auf)(h1 xviu;4eluvuo2 . uabout the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 t45g*geq6d r hgocx pq k.zk+0kquf w*/51ue o0o medium 3 as shown in the diagram. W.0kq e qk eo dczgq+r5kgw hf54*x6*/ou1gpu0hat 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+7m/pikw a*ni passing through three +inp k *miw7/atransparent materials. The indices 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 thehb gs ima6/,er ozv;)lx) a*,k path taken by a monochromatic light ray traveling through three b6mhv ,))*o kl/asaexzg; i r,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 gla2wchg pu4-ccc imyx++0 vw0 -ess ($n_g$=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 tht0 umc) il6.qwpwgu9 (e surface of a rectangular block of glass at an angle ogwct u ).0q6wulpm 9i(f $45^{\circ}$. 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 airz.h*p d5z9y nk into a piece of glass. Which one of the labeled arrows best indicates the path of the light ray after it ed.9nk h*pzy z5nters the glass?

  14.44: A ray of monochromatic light enterhlmbokw ;j l,2 6bk y86mei-8es the right-triangular glass as shown. The glass has an index of refraction of 6-26 hm blk bmy ekwjo8li,e8;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?