11.24: Two wave pulses travel to the right towaqlpg+2w ()w dkrd a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best representq)k 2+pww dgl(s the superposition of the pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes through the air anddf re4:n xvpp2q1h0mj -sp)6c strikes the surface of a plastic block. Which pair of statements correctly describes the phase changes for the reflected wave and the dxr6jf2pe:csp pv q-m0 n)4 h1transmitted wave?

  12.02: A ray of light passes straight dowb*khriyn5 /w.nward through the point labeled B in the diagram shown. The ray reaches a flat mirror placed at an angle* inw5.hr y/bk $\Theta$ 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 incidemu3v/u-+qh td+uq ry pi7g 6d1p8mw8p nt on

  05.18: A student hold a hand mirror to observe the back of her head whiles dawir9)ejlwm2;9v 4 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 be;sa lww)di4m 9e 2vj9rhind 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 enters a ne69n l b0zhl3*akxfw 1zw material. Which one of the following choices is the term best as0nfzxlh6wb k z la193*sociated with this phenomenon?

  96.19: Light that has waom, *tij0g5h 43rcx tavelength of 500 nm in air has wavelength 400 nm in a transparent material. What isoj45 tth, graxc3 mi*0 the index of refraction of the material?

  98.04: As sound travels from stee 3nafrp)4m9x0: b /yp6h (olimdlii9 nl into air, both its speed and its:

  00.01: As a wave moves from one medium to a seco5qqo tw /,ljez, vb:6and medium with a different index of refraction which of t56/, o:lveqja tzw,qbhe following wave properties would NEVER change?

  05.47: A sound wave generated frat -0kmcv2p wm 8vc6b5om a tuning fork of single frequency travels from air (with speed of sound vctba-k8p2 6mmv0c 5 w340 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 bottom kijmunaq i- gvl +p,08/ch fq)5j8(njof a swimming pool emits a sound wave that travels toward the surface of the water. In the water, the sound wave has a frequenc ,vlncp8 qjmi+uj -n08fig qk/hj(a 5)y $f_{water}$, 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 lq)hxsw4jbqf m9 5q (km7:v qo(ight strikes a rectangular glass block with an angle of incidence o5 qbfwj4(mx)q(9qsk ovm7 h:q f $0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of light is directed towar*cu)zh sfp b8-ko6 j2fi+ o-wed a point P on a boundary as shown to the right. Which segment best represents the refracted ray? i+w* o o k-fjup6-82c zfse)bh

  98.17: Which diagram best represents what happens to9bj4beab3 oo4 a ray of light entering air from water? Air is at the topjob3be 4a49ob in all diagrams.

  94.11: The critical angle of a material is the angle of incide0j:xco*j0w ;ma7j krk nce for which the angle of refraction isjor0 jw x*mjakk:7c 0;:

  95.12: The principle underlying 8t6wzsq.o)a w 0*h(jtxbxi d1fiber optics is:

  98.36: The critical angle in a transparent substance surroundfp1s ye+fbk/s3s, tmoa3(kq4 ed 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 t; l qdb(z;p8ian 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 inqdi t;(8;lz bp material X?

  03.15: A jeweler can di e u9-xp-tvl*dsqjs;7vwg,b :stinguish between a diamond and a piece of glass by obserp7- dv x:l*9qg t,v ;wbue-ssjving the critical 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. Whenrv/ng p 8p*ti4 the light makes an angle of incidence eq/g r p*vt8ipn4ual 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 index o )sq2l8 rm r1vs:1tvmxq w0he(f refraction n. The laser beam emerges from the material and hits a 2 r)(lm8r 1eq:sstvvh0wxm 1qtarget. 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 medium 3 as cg;;vmvp y-m*b:x(uq lxnm 1: shown in the accompanying figure. What is true aboumxl m *(b;nv vpcxqu:; 1mg:-yt the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium uhmmb*wi u))gswi 29 (2 to medium 3 as shown in the diagram. Wha m9w)2)m iguis(u *hwbt may be concluded about the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanyigcr j*-6 y4lztaf 2mct758mia ng diagram shows the path that a light ray takes passing through three transparent materials. The indices of refraction in materials 1, 2, and 3 are n1, n2, and n3, respectively. Which of the following best describes the rtg82rc mf*yc54 -6m ajaztl7 ielation between the indices of refraction?

  09.34: The diagram below shows the path t gxhdnz lc5 47 kb/tf7w)ml.fcrja82,aken by a monochromatic light ray traveling through three media.The syz8w,c.cflnt xd7h2 kbf) lr4mj75 g/ambols $v_1$,$\lambda_1$ , 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 trd2nn bp1,) kgoaveling 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.rsn x)1xi(lvje k5a9 incident on the surface of a rectangular block of glass at an an1e(v nsr5l kxaxi .)j9gle 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 tra0 4fyb n(r; bex3f8-s*wzpuli nsmitted from air into a piece of glass. Which one of the labeled arrows best indicates the path of the light ray after it enters the gl3 x(r*;0yip- 8z wsb 4nbuflfeass?

  14.44: A ray of monochromatic light enters the right-triangular glass as showjaa.i g5o(je. ysb; k/qlvuj/zi/34l 4r /sden. 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 after it exits t;d.a 3 u4ij4bl jsz/eraq g 5.i(/jel/koys/vhe glass?