11.24: Two wave pulses travel to the right tfw 5:p6:z, u6o:j znpcwp 6cwxoward a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best represents the superp::zw5wjp6 6cz:p ncwx6of ,uposition of the pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes through th 9t6gqvkfng(6pg51 ro2eo,.vpf a7dye air and strikes the surface of a plastic block. Which pair of statements correctly describe gfkp7tne1dg 2(po65qgvfar,.o 9y 6vs the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight d- e-y5+ojw boii9g0 o:hnkh4 zownward through the point labeled B in the diagram shown. The ray reaches a flat mirror placed at an angl0i jie4kgb:w-hono 9 5z-h oy+e $\Theta$ 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 occurarh *6rc7v pw(s whenever light is incident on

  05.18: A student hold a hand mirror to observee me ()yjdz,ua68 ikx4 the back of her head while standing in front of and looking into a wall mirror. If she is standing 4 ft in front of the wall mirror and she holds the hau6yazj,(d4 i) 8 xeemknd 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 it enters a ne,d + q9n(0np7m8qtzu(hhyczew material. Which one of the following choices is the term9(p dqhtnz qcz(8u+n7y, e0mh best associated with this phenomenon?

  96.19: Light that has waveleng*.3hx9 8 ct pqv hygh8sy l,t3w0 fwlxu9bfi28th of 500 nm in air has wavelength 400 nm in a transparent maws gfx8h,cq l3t u2 iy9 ybh8wxf*.tv08lh3p9terial. What is the index of refraction of the material?

  98.04: As sound travels from steel into air, both zg *od3/lbe 4ttv-v;lits speed and its:

  00.01: As a wave moves from one medium to a second medium wyw6e k 7tz;cvz8fhhi3lf,4wd q(8jh 9ith a different index of ;h7tw,j w88q9ikhvc6 e( zff4dy hz3l refraction which of the following wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of singjy/)l /a-o zinle frequency travels from air (with speed of sound 340 m/s) into rock (with speed of sound 1500/lj-i /zna)yo 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 pla hm+mvvtj7qfk7io1*48do ib +ced at the bottom of a swimming pool emits a sound w18i 4bhfdk +v* m7 i7o+vqjotmave that travels 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 rectangular glass block,(lfrevy an/; with an angle of incidavyln, f; /(erence 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 to th3+l i*+z begvpse/zp3o mf;e-e right. Which segment best represen p+-epzm/;boe+3lv *z3sefi gts the refracted ray?

  98.17: Which diagram besk-rv2 kea8) egt represents what happens to a ray of light entering air from water? Air is at the top inra k8e2)-gekv all diagrams.

  94.11: The critical angle of a material is the angle of intvk/mvk a 7k:.t7l4gacidence for which the angle of refrac7t.gvt:vam7 k/k ak4ltion is:

  95.12: The principle underlying fiber optics is6sa )c,cmis+ q:

  98.36: The critical angle in a transparent subskzj1nq:s2/f wpcp w5 rl1g*0u tance 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 materiur,y.y3 4wh st 1mc:amal X with an index of refraction of n = 1.5 to material Y with an index of refraction of n = 2.0. yahc.uyr, :41s3t mwm If the speed of light in material Y is v, what is the speed of light in material X?

  03.15: A jeweler can distuytjwr go 8 .ju7o17n7j1g b)vinguish between 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 criticng18tr b wyj17)ouvu o.jj7g7al 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 mz+)h n ogy /g 4o/0k4wxthzrj+aterial. When the light makes an angle of inciwk/4+h nt+0gjgzy)4o/or xh zdence 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 owe52q/cdb - dhf refraction n. The laser beam emerges from the material and hits a target. Sec e-d wh/bd5q2e 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 tr-9q n6tu t- /wdlan 80acfm;wo medium 2 to medium 3 as shown in the accotw0c d68au; w/qfa-tmnrn-l9mpanying figure. What is true about the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 o1 4pb,as7qny4ewp.yto medium 3 as shown in thep 7npyos,.a wqb14 e4y diagram. What may be concluded about the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows thez rdaj;)qbzfk2u b067 path that a light ray takes 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 abd7r jzf zb0;) qk2u6relation between the indices of refraction?

  09.34: The diagram below shows the path uoh3.8 byr y-i9tgh y:5jl;ettaken by a monochromatic light ray traveling through three media.Thh -9gi l3jy 8:u.bteytyo;5r he 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 glasm*6c8a-;n flq jmr +jjs ($n_g$=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 rectanguvjucyn() 7mzs,d9y5a i(lp k7lar block of glass at an p d)c v(75mlayusjnk9( ,i7yzangle 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 froz wv yuwj(jt4;a3 dqdy5/4hd* m air into a piece of glass. Which one of the labeled arrows best ij;y3qy h*(j d /w4vdtz5u4awd ndicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters the righdo m; +4 tkk/en-a+d zc57rqlqt-triangular glass as shown. The glass has an index of refraction of 2.00 and it is surrounded by air. Which one of the 5z7+tral od;-qd + q4kn/kmeclettered rays shows the path of the light after it exits the glass?