11.24: Two wave pulses travel tpwbvr/,a9 r 1po the right toward a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best represents the superposition of the pulses when the center,rrpw1av9/bp s of the individual pulses coincide?

  08.30: A light beam passes through the air and strikes the lxb-d3cxz )d 55(n cpxsurface of a plastic block. Which pai5)xdpc(xb 3l -zxn5dcr of statements correctly describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward through kjf;ja6 jvs ug4-*au )the point labeled B in the diagram shown. The ray rjksa)g-4jvu ;a*j 6ufeaches 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 occurs whenever light vk imd/0 z9sfqgh/k6vglu)5)is incident on

  05.18: A student hold a hand mirror to observe the back of her head while sta l5wqwqls +d)3hrcu +oxd/ 23xnding in front of and looking into a wall mirror. If she is standing 4 ft/3oxcx r2+ hqswldw 5+q )ud3l 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 enters jzhjh-g tx3r i4k:+ s1a new material. Which one of the following choices is the term best associated with this phkrh1s :4j zitjgx+-3h enomenon?

  96.19: Light that has wavelength of 500 nm in air has waveehco+4k+cy0i b 8( onr9vyu-tlength 400 nm in a transparent m h i(c8oe0 ku9r-t++b yycvno4aterial. What is the index of refraction of the material?

  98.04: As sound trave+un - opbrmbs44* khh)ls from steel into air, both its speed and its:

  00.01: As a wave moves from one medtf n3ft04xx. f-lvxz3ium to a second medium with a different index of refraction which of the follo t30vlx tnzf3x.xf -4fwing wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of(ds0(:bncz3e c maa7o 0 9dfxp single frequency travels from air (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 aem0cfsa0pnco9(ax3 d:7bz( d s it passes from air to rock?

  14.28: A waterproof speaker placed at the bottom of a swimming pool emits /irxvtbhi-, fg54k h 63muc2mgtk oh5* tx )-ga sound wave t3-5 )m4 bhhog25mt ut gti-/h*,i6cvxxrk gkfhat travels toward 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 recta6- amluigl0: cto ;+atngular glass block with an angle ofgl:aa+i t6t;u0 m-clo 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 uu,nqoj8 xcrp9vyjr hk(45.5 point P on a boundary as shown to the right. Which segment best represents the refracted rayr jv.prk5n9uh,y 8u4(c jq 5ox?

  98.17: Which diagram5m+ xnxv x+:ms best represents what happens to a ray of light entering air f:xn+ xm xm5s+vrom water? Air is at the top in all diagrams.

  94.11: The critical angle of a material is the m 8djno75yt4 h ow3so4angle of incidence for which the a4mowdoyt 4ohj s3n8 75ngle of refraction is:

  95.12: The principle unwoty)at - 5v 61y0jmdkderlying fiber optics is:

  98.36: The critical angle in a transparent substance:i0d eneu7 s:db4. tz(l vcpbl14ooh 5 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 m ;3 b5veqmqeu5yi b0e7bn)sc /ed;f7n aterial X with an index of refraction of n = 1.5 to material Y withdb )7ienen q 50s fe75;yubb;3mv/c eq 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 material X?

  03.15: A jeweler can distinguish betweeh;jkuv1blbicz jcs /8c( pg90 *v;k b3n a diamond and a piece of glass by observing the critical angle of the light in each material. Glass with an index of refractiovu g3j;hcj/ b*p( l80c kb9kzsc ;b1vin 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 8odqog uo /kns/(t.r-the light makes an angle of incidence equalo8dosqo .u rg //n-tk( 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 embeoz2kknbqhd q/y9 1pu8wm) ,x-dded in a material of index of refraction n. The laser beam emerges from the materqdhym-u8) bp1/ nk 2,xwqk9zoial 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 medium 3 as shown au jxqu09 he/l( xs7h5in the accompanying figure. Wxh5lq9x us0 7( eaj/uhhat is true 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 aso jdgnj,v :s:0 shown in the diagram. What may be concluded about the three indexes of refraction, n1, n2 andd:0s n:j,ojgv n3?

  97.24: The accompanying diagram shows the path that a light ray takes /t3a8l,u9agh + :hp il0rwmxlpassing through three transparent materials.ah t/:,u +0wi8 m3allxlrhgp9 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 the path taken by a monochromatic light i.ag (,nmfso 1etpl:pi,ag1rhg; 8f1ray traveling through thre:gter ho;ais mfga11(npfg 8,p1li.,e 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 glhhekt 1q 2ll-kp-.o s)ass ($n_g$=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 ligh)s:ml7q vs 2jfec6k-kt is incident on the surface of a rectangular block of glass at an angle o7jf-:2)vks kc s 6lqmef $45^{\circ}$. 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 /(o tjyoddp6a,n6 kw41tfr *s/f0rmv;r nqx / from air into a piece of glass. Which one of the label6jdk y6 trw /sm/(rd,rtao4p/; vnff*0n x q1oed arrows best indicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light ee a/eyoza i,*1h k-.hinters the right-triangular glass as shown. The glass has an index of k-a1zi/ho ,y *hia ee.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?