11.24: Two wave pulses travel to the right 1bg(hahw.83 fl2e ji 73wieuc 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 theci3 guh awh.7wil3bf e8(e1 2j pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes through the air and str3 z 8qbs.x/xjdikes the surface of a plastic block. Which pair of statex3sjxdq/ .8 zbments correctly describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward through the point labeled B1e 8bflcb, -mtjp1zv 6 in the diagram 8jv l6 m1-t,bbe z1cpfshown. 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 occurs whenever light is incident a :a yl+ho0dhir.6qz:on

  05.18: A student hold a hand mirror to obse:8b *f v v/h4h0aiyq jwl1xk(vrve 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 her head, she will see the back of hf(/ja 8v1*:bx q hv4wlhyv0kier head how far behind the wall mirror?

  14.25: It is observed that a light ray changes direction when it enters a -eb( og/;vrzw1 0ge xjnew mateegvogw(r ;b/ x01jz-erial. Which one of the following choices is the term best associated with this phenomenon?

  96.19: Light that has wavele) .ebhssz6 tw qwvw538ngth of 500 nm in air has wavelength 400 nm in a transparent material. What is the index of 5)zs tbwqwwve68hs.3 refraction of the material?

  98.04: As sound travels from steel into air, both its speeu0jgpb lp3kjs5* fq n07td:w 7tj yc;p-h*y: md and its:

  00.01: As a wave moves from one medium to a second medium with a differejj mbls;nv ,;:nt index of refraction which of the fo;s;vml, jbj :nllowing wave properties would NEVER change?

  05.47: A sound wave gy s i, c3y/kz,*ut1xik9)ofk zenerated from a tuning fork of 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 as itsfz,/cku 1 y io*,3ixk9tkyz ) passes from air to rock?

  14.28: A waterproof speaker placed at the bottom of a swimming pool emit-.5lruckcc v (s a sound wave that travels toward the surfa v5( lrucckc.-ce 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 block with and6r uze3 c eefnc 6:.ihfe2.;j angle hf ei3.;rneud. c 6j2c6:fe zeof 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 P8lfww5pvh-ff : a.b7m on a boundary as shown to the right. Whichlff-h5 :pawv8 bf.7wm segment best represents the refracted ray?

  98.17: Which diagram best represents what happens to a ray of light enterin6bt k m5lne1r;g air from water? Air is at th;5b1en lt r6mke top in all diagrams.

  94.11: The critical angle of a material is the angle of incidence for which thg*ilu p6:hxzbz:h h(7e angle hhbg6i ::px*l z(hu7z of refraction is:

  95.12: The principle underly e/o1cwdj y1z+ing fiber optics is:

  98.36: The critical angle in a t 7p0zbs/9f + huvfudxx+qm6* e ivj3qg bo12.eransparent 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 oflef9 voma 6/w/ 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 lif6 v/o wel/a9mght in material X?

  03.15: A jeweler can distinguish between:wb-hrdim(f. a diamond and a piece of glass by observing the critical angle of the light in each material. Glass with an index of refraction of dh- (:frb. imw1.52 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 make3qk ylqp1rgr ls7rgqx7t (h.8:n9 y9l s an angle of incidence equal h :rtlp(7l 7rn.9 138kxlrysq 9qyqg gto $30.0^{\circ}$, 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 of re* r,,v4 mdtunyfraction 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 value of n i tny,,m4 dvru*s:

  95.31: A beam of light passes from medium 1 to medium 2 to medir5hv c;s*l c5lum 3 as shown in the accompanyinl5r*c5 ;sh vclg figure. What is true about the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of lightqq7-/ ltjy)abf8fa 5a passes from medium 1 to medium 2 to medium 3 as shown in the diagram. What may be concluded about the three indexes of refraction, n1, 5 l)-q8tf b/ y7faajaqn2 and n3?

  97.24: The accompanying diagram shows the path th2( n0b903 ce(yf*,imrjnlxeu:la jiaat 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 relation between the indices of refract3*yi:i bme0rlncea l09 (ux2,a(j jf nion?

  09.34: The diagram below shows the path taken by a moh 0vg)t p8moseiz41 1ynochromatic light ray traveling through three media.Thzs41e vgpo0y)t im 18he 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 o8+(qsgh b0 cwjen;xy4k8 a8zglass ($n_g$=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 surfacevz ehc)b4eeb-vp1-j - of a rectangular block of glass at an angle o1)hbcb-4 -ezpj evve- 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 transmznx;1*,324or iuodo0e rvv ojitted from air into a piece of glass. Which one of the labeled arrows best indicates o;,2u er10ji o3ovodz 4vnr*xthe path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light entersn od5(g ys6f/w the right-triangular glass as shown. The glass has an index of refraction of 2.00 and it is surrounded5(o /sy6dwg nf by air. Which one of the lettered rays shows the path of the light after it exits the glass?