11.24: Two wave pulses travel to the right toward ut26y6 ml(nl *f 4wfoga rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of th6u(*n4f g62ly wfltmoe 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 strikes the surg 9*jyvdhd 7qk(og(-aface of a plastic block. Which pair of statements correctly dedahj7qkoy g-9g( *(d vscribes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward throwo1iuy2h :ga/ ugh the point labeled B in the diagram shown. The ray reaches yogw1:a/ h2iu 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 reflectiok.qo pbgtm+cufl7 1,w e ,t8d+r0;zukn occurs whenever light is incident on

  05.18: A student hold a hand mirror to observe the back * 4uy wme: ngbm(dl(4fof her head while standing in front of and looking into a wall mirrowmm(d4:fbn u*4 y(lger. 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 her head how far behind the wall mirror?

  14.25: It is observed that a cevnh9k.ipvuh5bu, 4 .2yog)vo ; (m glight ray changes direction when it enters a new material. Which one of the following choices is the term best m;y ch).( b9 vue5 p,vh2gigu n.ovk4oassociated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavelength 400 -ao4hg4wrvey g48;upqeg:j 0nm in a transparent ma ogpg4e:4aeg w0;8-ujhq4v yrterial. What is the index of refraction of the material?

  98.04: As sound travels from steel into air, both itsu622-g,ub rvqjd dyr . speed and its:

  00.01: As a wave moves from one medium t6g:- mnn, a* zhfsu8zq;xv,syo a second medium with a different index of refv -xshzu;f,mgny*6z,sa8 q:n raction which of the following wave properties would NEVER change?

  05.47: A sound wave generated from aj9c xz mmj2;9e+ys1kz tuning fork of single frequency travels from air (with spee y9j1zcs2+e9mk ;z xjmd 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 emits a s(z * .h5odd4jw *yv6o)vdaixoound wave that trav*w5jo d )4hoi 6dv z(.vxy*daoels 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 rectay/mvfwjdj3q5z7i 40)2 uasrwngular glass block with an angl50ajd2q7w zy)4f m3 jv ruws/ie 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 of0 98:t0cqp s pp7g6azghiq79ee pf3 bn a boundary as shown to the right. Which segment best repr qpp8 s9e h0eitqgg cpb6p7a3:f9f0 z7esents the refracted ray?

  98.17: Which diagram best represents what happens to a ray of ligh:1ul(t6 jcjmn e8tjz*t entering air from water?6jje( ml 1ct*tuzn8j: Air is at the top in all diagrams.

  94.11: The critical angle of a materia,ld (slk(x lx/l is the angle of incidence for which the an(lx /(,ksld xlgle of refraction is:

  95.12: The principleosed 7qx(kkf ( ,lk;+-+ovfdl underlying fiber optics is:

  98.36: The critical angle ,(t cpcoaf13s in a 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 refraction of n = 1.5y g;-dnr6k,l th mwq2kgd3*1ji b (p;t to material Y with an index of refrakw(kiy6 1n ;-bth3rljt m p,*g2q d;gdction 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 b+jk7zq6jcdfb *7v. ep etween 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 1.52 has a cd6p ckf*vz7b+7.j jqe ritical 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 light4 e zdw6vn fw+i9gt+il9kox51 makes an angle of kt i1ond5 9wglefvi x9z46w++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 of gj 8c8lm7ihag 6 -ke8xindex 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 tag6mgce- 78i xkjh8al8rget. The value of n is:

  95.31: A beam of light passes from medk 5i5w:g 5+speddq5yrium 1 to medium 2 to medium 3 as shown in the accompanying figure. What is true about the respective indices of refraction (n1, g5rds5:k5+ dype w5iq n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to medium0qv *2lcq i7zj 3 as shown in the diagram. What may be concluded about the three indexes of l2 j07q*qcivz refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray takeshbry ptv + /t.. qmuiak+6v.n1 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 relatv vb.1.miqat6uyth p ++r/ .knion between the indices of refraction?

  09.34: The diagram below shows the path taken by a monocho8stnq p8v ,8lromatic light ray traveling8,ql8p8 ost nv 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 2ixixk ib n,6h* ).ejnglass ($n_g$=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 surface of a rectangular block 6g:an((6wh wh9fh9rtr fck4 9gpmoj, of glass at an angl69cafw jhhrr(n( 4m,6okt hg9pw 9f:ge 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 transmitted from air into a piece of glass.b9 ( mnusfw:g- Which one of the labeled arrows best indicates the path of the light ray after it entm -(gsnf:w9u bers the glass?

  14.44: A ray of monocm;zg,-zc xo0 shromatic light enters the right-triangular glass as shown. Tszz0mo,xgc-; he 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 the glass?