11.24: Two wave pulses travey-nk5n5b b3g4rf x8ncl to 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 r5kcnnb4gb85y - nx3rf epresents the superposition of the pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes through thke.; lr)4gii we air and strikes the surface of a plastic block. Which pair of statglirk.4;ew )iements correctly describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight 7qtvn . fyi62e5.rjkj downward through the point labeled B in the d7 2jf5i6j.yeqn vrk.tiagram 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 reflection occurs whenever light is i 9fd 0x rr vl4p5cst5m(p;+wtlncident on

  05.18: A student hold a hand mirror to observe the back of her head while up: rtq.i1*ljstanding in front of and looking into a wall mirror. If she is sta.rq: itljpu1* nding 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 wall mirror?

  14.25: It is observed that ae5 0.w1/g+keu3s d dvkh 5ezie light ray changes direction when it enters a new material. Which one of the following cg.ed0 w55k dhe1e s3uekzvi/+hoices is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 50hmv-,py6ou1 u( m/t nl0 nm in air has wavelength 400 nm in a transparent material. What is the index of refraction of the6o(-/m1 hpu ,luvym nt material?

  98.04: As sound travels from steel into air, both its speed an;(o o7fni f:tzd its:

  00.01: As a wave moves from one medium to a second medium with a differe 2cuq-v s8kg(mnt index of ref-s2kmu ( cvg8qraction which of the following wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of single frequency travelsux6a p8hubfid e qpdn:r1 9d6gme9q41 , cy,k0 from air (with spee61rudh nu:fm9y 1i8degdapkpe c,6x, q09b4qd 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 bottom of a swimming pool emid n *kmvas94;j sx7uz)ts a sound wave that travels toward the surface of the water. In the water, the soundva)4;um s j7n* ksxz9d 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 glasshkz cx-3z1xxzz* xz:/ block with an angle of i *1/ ckxxx:3-xzzzzzhncidence 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 as shown zb09r jg-jr q0to the right. Which segment best r0bj- zqr9gj0 represents the refracted ray?

  98.17: Which diagram best represents whf9 ;xt7 se4v4lqt9 meoat happens to a ray of light entering air from water?9tx q4v9 ;moe7fe4lt s Air is at the top in all diagrams.

  94.11: The critical angle of a material is the angle of inciden/cpfq-o 9 f f(3rst7 cpl2hk5gysmw,.ce for which the angy.f kwcf/-p sq5srlf,p( ght2o mc379le of refraction is:

  95.12: The principle underlying fiber optics ; iqwx8u/i )ucis:

  98.36: The critical angle in gzl/5( sofn( 0ql7skja transparent 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 reezqis hk6nb 24 +v,jz,fraction of n = 1.5 to material Y with an index of refraction of n = 2.0. If the speed of ligh+e 6bsz qnhki4j2 z,,vt in material Y is v, what is the speed of light in material X?

  03.15: A jeweler can distingu/jhr ) -fv0dd x)owh5gish between a diamond and a piece of glass by observing the critical angle of the light in each material. Glass withrxf 0gv/h5 ohj)d wd-) 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 infla7 6dsk -d/j+myc2tto a clear material. When the light makes an angle of incidence eqd+jc - fsdl7m2ay/k6tual 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 isx g*s:6vdrx j9 embedded in a material of index of refraction n. The la6j*:xrgx 9sdvser 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 is:

  95.31: A beam of light passes from medium 1 to medium 2 to medium 3 as shown1sjk,-,n v snobq .;dl in the accompanying figure. What is true about thds-l n;on,s.,1vkb qj e respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes frui,x74q. ew/cdr y6 nlg9gey2om medium 1 to medium 2 to medium 3 as shown in the diagram. What may be concluded about the three indexes of refraction, n1, n2 anw n7qxei24 lceg/g6d 9uy,r.yd n3?

  97.24: The accompanying.o :jz2,b0f)gp pgbja0 nlj0 *qg1sus diagram shows the path that a light ray takes passing through three transparent materials. The indices of refraction in materials 1,s.pj:ggbop) 00alzbq 1n0jgs2f* u, j 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;g;pgjt mr ,iu)55tw oe.bf( s by a monochromatic light ray travel)gtwj5pr .(fo5m;s,g ;t beui ing through three 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 glasptbec06d; rt i8 q32tzs ($n_g$=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 cmfl)vf2m 3 zly4lqo/o,i (e*59tul lon the surface of a rectangular block of glass at an angl5/ym2to fl)liq9l*(, l3z4lfvcoue me 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 tran x9p2kh jx7hz.vq9 om*smitted from air into a piece of glass. Which onx zvmxk9pj 9q7h*2 oh.e of the labeled arrows best indicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters the right-triangular glasser7 92pixzi x-8r1 q.inhdk, o as shown. The glass has an index of refraction of 2.00 and it is surrounde dxii7i.p9zrx r1k 8n, h-2oqed by air. Which one of the lettered rays shows the path of the light after it exits the glass?