11.24: Two wave pulses travel to the right toward a rigid boundary as sh;sh+ m.*z er x*cs/jwxown. After reflection of the trianmx;wcx / se+rzs.* h*jgular pulse, the pulses will interfere. Which one of the 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 strik dhzop5 fk/ lz95: w,utcyn/m)es the surface of a plastic block. Which pair of statements correctly describes the phase changes for thhncol9pkz:md )5,z/ufy5t w/ e reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downwar1lki1gs ,5u;yc qwz /dd through the point labeled B in the diagram shown. Tdlg;,kwsi1/ 1z quyc 5he 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 izzq)r48vvp hw6v (zkdym1 0d.tfz56 dncident on

  05.18: A student hold a hand mirror to observe the back of her 98v3reootz, bqtre. ne b3,z/head while standing in front o zqr3, 9/bntzteov,o8.bere3 f 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 her head how far behind the wall mirror?

  14.25: It is observed that a light ray changes direction when iuu8 xr 1xk+h5vt enters a new material. Which one of the following choices is the term best associated with this phx u kuh+x581rvenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavelenrgk8vghtic:;2uk o6; gth 400 nm in a transparent material. Whatrvcu; 8oitg;:6kgkh 2 is the index of refraction of the material?

  98.04: As sound travels from steel into air, both its speed and i (609xhi 6+ udcqu;x6ii vmevkts:

  00.01: As a wave moves from one medi x8w6rll9m aio2jf62v (z drm4um to a second medium with a different index of refraction which of the fr v2o9mlwfaj2 (8zdir 4mx66l ollowing wave properties would NEVER change?

  05.47: A sound wave geb:4yi4zri4g xnerated 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 thi4 g4rxiyb4: ze wavelength and frequency of the sound as it passes from air to rock?

  14.28: A waterproof speaker placed at the tdd,lgubl - 3;) qevcdj2)nx4bottom of a swimming pool emits a sound wave that ug 342de ))lc t,nd-;qlvjx dbtravels 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 rectangulgapu 4mo r6a+i a33u/qar glass block with an angle of incidence uqm ra/ipgaa 43o+u36of $0^0$. 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 poqd0copn)0m 8j w-)i/4ppv o crm)/qpc int P on a boundary as shown to the /p op/c p04mrjvcn-i)dq c)opw)qm80right. Which segment best represents the refracted ray?

  98.17: Which diagram best represents what happens to a ray of lighty-ob93ky +z )u* ngeis entering airy-)u3 *z9+ oygkn iebs from water? Air is at the top in all diagrams.

  94.11: The critical angle of a mata*x 8t orq5vl0(mto;+. omeiterial is the angle of incidence for which the angle of refraction is: l+ox5o toeiar (*0;vmtt8 m.q

  95.12: The principle unkw*nigpt)it4f 26p0 hb 9 oo4pe-c3 zbderlying fiber optics is:

  98.36: The critical angle in a transparent substanc pw8r-6z1le5oc37bs tfxw4 z ee 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 wief,bd37 kochl6u7pi cl.nx(j4.;ew pth an index of refraction of n = 1.5 to material Y with an index of p7;l 7, lneeiwcf(jpk6..xobch ud 34refraction 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 dim-uan9; (t jmrgf- xe5stinguish between a diamond and a piece of glass by observing the critical angle or -ummj-;n 9x(5geaft f the light in each material. 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. Wh 8z n,z,t7-hqd pmoz.aen the light makes an angle of incidence equ8 q,zm7nh .d zp-o,atzal 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 eb ;,fgv 7 mlboq4*d jl-tg9cq*fuh,q8mbedded in a material of index of refraction n. The laser beam emerges from the material and hits a target. *gchjvu8, qq ;t79 l*bq -mf bd,ofl4gSee 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 tb slh 7k)t(9weo medium 2 to medium 3 as shown in the accompanying figure. What is true a7t bhkw)9e(s lbout the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes trj enog+ydv8l4 ( 2f+jb.mh .from medium 1 to medium 2 to medium 3 as shown in the diagram. What may be concluded ajvy.no2bf+e j+.r dg8t hl m(4bout the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a ligh ro93uk 9znf4lt ray takes passing through three transparent materials. The indices of refraction in materials 1, 2, and 3 an 4fru3z9o9k lre n1, n2, and n3, respectively. Which of the following best describes the relation between the indices of refraction?

  09.34: The diagram belowk7(r i+yrn -ds shows the path taken by a monochromatic light ray traveling tr(dr i+k 7-ynshrough 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 gl 7lnt2 g bsyxcb321;wbass ($n_g$=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 rectj,gl2wvsv-n + 7 3 iob9/. gbshns+d(f4yzmgjangular block of glass at anob/l9s+ 2s7sfh .b3g ( z+v,mjgjn4n wgv-yid angle 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.d3bn8eggps- , Which one of thgn-bp,3eds 8ge labeled arrows best indicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic lighx6sp)9zxy6dyd a4kx /t enters the right-triangular glass as shown. T6 xxy9 azxp6 4/dd)skyhe 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?