11.24: Two wave pulses travel to th7 /rsgug9 23bc2dym sje right 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 the pulses when the centers of the bc7 yjg2mdss g/239ru individual pulses coincide?

  08.30: A light beam passes through the air and strikes the surfa+1vr/ y+uyaaeqp-cz 3 ce of a plastic block. Which pair of statements corre-pav+ 1rqu a +cy3e/yzctly describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward through the point lan4; r5ws 9pbhnbeled B in the diagram np b4rhw9;s5 nshown. 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 whene ;xqs)6x2dgh l-jw; sgver light is incident on

  05.18: A student hold x4ax:10lgax6 3.jnecw u7 hra a hand mirror to observe the back of her head while standing in front of and looking into a wall mirror4r axx:x6j3wh.lg70 aanc1 ue. 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 dydh6hw609ms- c;wko+k kk8 o changes direction when it enters a new material. Which one of the following choices is the termkkk mo06cwhdw689-h;ko+s y d best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavelength 400 nm in a tra/k0 m4mq( +8bzqu. imq3upyy hnsparent material. What is thyq yimqz 4./ bup3h( qu0+m8mke index of refraction of the material?

  98.04: As sound travels from steel into air, both its speed anvt8uv1vm1 p1w d its:

  00.01: As a wave moves from one medium to a second medium w2q+yc)z4udk( s; ws bjith a different index of refraction which of the following wave pw+ skb)dy( s2uzj ;4cqroperties would NEVER change?

  05.47: A sound wave generaq ( bg;/wimic2ted from a tuning fork of single frequency travels from air (with speed of sound 340 m/s) into rock (with speed of sound 150qbw(mg2i; i /c0 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+1 zeqvw-us rzab*f )ifbz 80/ emits a sound wave that travels toward th ba+v)u rf s0z*8zze1- qfiw/be 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 g* u sauu/v i*,wi6)6q lhws0twhite light strikes a rectangular glass block with an angle of incidence*ia *u/)utuvwswg 06s6qi,hl 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 boundary57s*txspe r9: ox(+ztoa d2oh as shown to the right. Which segment best represents dsa t ot+oxp( 9 os5r7:xh2e*zthe refracted ray?

  98.17: Which diagram best represents what happens to a ray of lightkd g kb5 2(ez-9zw3adl entering air fre5-bgz 9 3kwkz(a ldd2om water? Air is at the top in all diagrams.

  94.11: The critical angle of a material is the angle of incidence for whi3 z wjg3 iz0up1 fs*pfu7t*sm;ch the angle of refraction is:*sigj1 ufp03*7t3zpu mzsfw;

  95.12: The principle underlying foybmu0z* s0 q0ms/:lbiber optics is:

  98.36: The critical angle in a transparent substance surrounded by air is j hs ke);w,*lb g.h,iavhd x (s;/u3kp$30^{\circ}$. 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 ot.w5s2x8ad;; gf b0a:f/e1 c neq ictzf refraction of n = 1.5 to material Y with an index ot ;gn1ef f 0taa 2id8z.xe/wb;sq :c5cf refraction 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 betweep uprdw5/sk9 fqv2b6+9c ,luvn a diamond and a piece of glass by observing the critical angle of the licw lvdbks ,+5/ 6qppfv9r2u9ught 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. When the light makes an o8e da.a- b.swu+ 9ambangle oa baewm u.-a.sdb89o+f 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 index of refractiq k9fcb 8.uku6(j s3kfon n. The laser beam emerges from the material and hits a target. See the accompanying figure for the position.k9 3kcbqu6sj uk(f8 f parameters of the laser and target. The value of n is:

  95.31: A beam of light passes from medium 1 k1fuify(x xd3 33 v+(dlnl1os to medium 2 to medium 3 as shown in the accompanying figure. What is true about the respective indices of refraction (n1yox3 s(fxiu3 1df+klvd1nl(3 , n2, and n3)?

  00.14: A beam of light passes f4rckowh+:z q) rom medium 1 to medium 2 to medium 3 as shown in the diagram. What may be concluded about the three inde +kqcz h:)4orwxes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light 2dz5v wg+ (hrv5wtsw0 ray takes passing through three transparent materials. The indices of refractio(wv5v0t 25+hsw wzdrgn in materials 1, 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 by a monochmjlx* a68 56n0t pqo.omwcqp ,romatic light ray travelilx6q twcm ,q .0*p 6aon58pjmong 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 it sx;2p9- v fv8saau7dn 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 inciddlmh409h7e *gix tmm 7 fg**ubent on the surface of a rectangular block of glass at an angle of 7 mm*ge*4 h f*im79gxb0dl htu$45^{\circ}$. 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 ints/xyji2xyc6(hq33 u no a piece of glass. Which one of the labeled arrows best indicates the path of the lighhq y cx3ux/2 6si3jy(nt ray after it enters the glass?

  14.44: A ray of monochromatic light enters the rius -9qtfz.q v6j 2qk1yght-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 rayqju1yzsq f-t k.2q v96s shows the path of the light after it exits the glass?