11.24: Two wave pulses travel to the right toward a rigid boundary as show4g 6x32.6is* rbrz5gdwk c cgbn. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best represents the superpositi5gx6w.d*3bgzr2b4 sc rg i6ckon of the pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes through the air and strikes th(r1ttivy97gu j jw)ro 8bab- j xwn07(e surface of a plastic block. Which pair of statements correctly dw-u8rn 1)tyoi a wxgbtj0bj(v 7( j7r9escribes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light yzi uzfk 62q +9:ulpz;passes straight downward through the point labeled B in the diagram shown. The ray reaches a flat mirror pp y+:lq2;k zzu6fui 9zlaced 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 ocvkf/t;k 2nbxo/ 0r1bg.eyq8v curs whenever light is incident on

  05.18: A student hold a hand mirror to observe the back of0tldwpw.lw 0vyaxl;4i7 wf : 8 her head while standing in front of and looking into a wwlx8l:l i fyw.w 4tpa0;d0w7vall 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 her head how far behind the wall mirror?

  14.25: It is observed that a light ray c+v yue+2nb x) 0tn5e5pqjrf1ahanges direction when it enters a new material. Which one of the following choicv) xen5qfye2t0r p+ ab+5unj1es is the term best associated with this phenomenon?

  96.19: Light that has wan0 oz5emp2a;uwvh4td9 i3 * apvelength of 500 nm in air has wavelength 400 nm in a transparent material. What is the index of refraction of the mnhw 3mp92e;5davp * iua0o4tz aterial?

  98.04: As sound travels from steel into air, both itslb.w zjdj3k0n;; sm*qi4h *zg speed and its:

  00.01: As a wave moves from one medium to a second medium with a differ nld,s3u j-g5 zxh/*beent index of r3h5 bjgu le *znd-,/xsefraction which of the following wave properties would NEVER change?

  05.47: A sound wave g8ewni+o4 7o98zibtf denerated from a tuning fork of single frequency travels from air (with speed of sound 340 m/s) into rock (with speed of sounz f4+wdiob7 nt ie88o9d 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 sot/.jwuuq lu-ulmu /w q )cv1v43 s6vm(und wave that travels toward /m.lucutwjs1v3q -quw l6v/vumu 4() 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 rectangular glass block with a+nz qbyl95m3o wtd 6fs :(t-skn angle of inciden6qfz d:+593 wylst- s to(bnmkce 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 toward7r0,jqvt3/p d)z w :8dstz9ujtct0l v a point P on a boundary as shown to the right. W,j 030sz :/w cp8d qd7lrtuztttj)v9v hich segment best represents the refracted ray?

  98.17: Which diagram best represents what happens to a ray of l97m 0;j phahqmzmmc9 :ight entering air from water? Air is mq90m;ma mch79 :z jphat the top in all diagrams.

  94.11: The critical angle of a material is the anglqf+2iqtsfa9 :d 3dib:qlts21 e of incidence for which the angle of rea :dt qtfq9is12 dqlfi+ :32bsfraction is:

  95.12: The principle underlying fiber gmr v2bh*/k1zoptics is:

  98.36: The critical a4b8() j--vdoqr nf tvangle 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 b +0lp zvvm88aan 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 of8 vb08p+l mazv light in material X?

  03.15: A jeweler can distinguish between a diamor4u phos*d;)+ 4 n84m jvaslt,0 blrocnd and a piece of glass by observing the critical angle of the light in each mater)44hv 8;4ocnlrspu j o+*mlrs,t0abd ial. 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. When the lil)x6 hhmmh +6xght makes an angle of incidence eq66)hhxhx+ mml ual 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 ;i /vh 57tp oe+qg7 1twwhgy;qof refraction n. The lagwet7oq /7i;15 +h ;pvghtwqy ser 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 from45kj4pgo bcf3ho.md q9 ; ( 4z8ifuhvk medium 1 to medium 2 to medium 3 as shown in the accompanying figure. What is true aobhzf8imdjq.vo (k kg4 54hfu49cp3;bout the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to medi, ezv-hy 6iq1tum 3 as shown in the diagram. What may be concluded about the three ivzhqi1y, 6et -ndexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray n*arf.ozp)jt : qpxk.l7g: n+9pr 8rqtakes 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 de+a7k98ft:lq rgrpq.p * .)zro nxnpj:scribes the relation between the indices of refraction?

  09.34: The diagram below shows theoxuaa)* 8c3doj;p nd bb7,/9 r pt(jhm path taken by a monochromatic light ray traveling through three media.To7(cm*/ x,dutp; b9rbp3 a8oaj)hndjhe 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 toh0n6y 5;foasraveling 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 incident on the surface of a rectani;8 r58mp: 8ullrg6da islx0 wgular block of glass at an anglel ;s wxd5i8 rlp r8iamg8:lu60 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 transmm rkbv;t iz *9 a7leh:;n00fzoitted from air into a piece of glass. Which one of the labeled arrows best indicates the path of the lhmk;7 9r0fze ob lt:*0izv;anight ray after it enters the glass?

  14.44: A ray of monochromatic light entersz ;hsjk1o, 1 1krkdf*k the right-triangular glass as shown. 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 exiz1s,k;k1kr* oj fk hd1ts the glass?