11.24: Two wave pulses travel2edg-) -yg5irm+ y ybi to the 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 superposit iy+2yey)dbg 5rgmi--ion of the pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes through thd bf) vn-6ev */zrvp;hdgvr0u*s:a v .e air and strikes the surface of a plastic block. Which pair of statements correctly describes the phase changes for *)r*hv0-6z.v d u;pg /en: bafsdvvrv the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward through the poinx6hg6xfd n-/i) cn :dot labeled B in the diagram sho hfxnoi 6c6dd )xg/-n:wn. 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 reflectioae8jxhc 9+d1 1gku ft*n occurs whenever light is incident on

  05.18: A student hold a hand mirror )5atxu zp5l 2kto observe the back of her head while standing in front of and looking into a wall mirror. If she is standinga2 5xku)5ltzp 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 itk c3 8/4lyaiqdcao02etj * dl( enters a new material. Which one of the following choices is th /cdtea0odq8l2lc3(4aiy k*j e term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wav,-es jq o.1d4ftee3sz8fycn :elength 400 nm in a transparent material. What iqen :4eyzdoj.e,t s3c s18ff-s the index of refraction of the material?

  98.04: As sound travels fr.bbkg 6) r.q mv+4iuxvom steel into air, both its speed and its:

  00.01: As a wave moves from one medium tok3b:6h bl,j bw4 ,lffi/gith: a second medium with a different index of refraction which of ii,jth 4/ hblwbf6l ,g:b k:3fthe following wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of sinrqr x+i2,r.,,3 hczuzip, kexgle 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 the wavelength and frequency of the sound as itzx+,,i23h,e,r qr ipczx ur.k passes from air to rock?

  14.28: A waterproof speaker placed at the bottom of a swimming poo;:kt4pwp zgchzz 5 ;n1l emits a sound wave that travels toward the surfwpz 14g;tkcz n5:h;pzace 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 glag4p4;tl4f ulsss block with an angle of incidence of4 up;llf sgt44 $0^0$. 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 svujg+i3pn - )xxrz0p4xd 9 6euhown to the right. Which segment bn3946eupixp -0u)vdx x zg+jrest represents the refracted ray?

  98.17: Which diagram best represents what happens 98mp(y u a8n8h a m ,ibhsi,ww1svdyf/4vw8 ,qto a ray of light entering air from wate9p 4i1f/bwm8 nu8y(vhhmw8sq8s, va, ,i dwyar? Air is at the top in all diagrams.

  94.11: The critical angle of a material is the angle of incidence5o guy+p+df6b for which the a ybf5 p++g6uodngle of refraction is:

  95.12: The principle underlying fib hajtk5d;*o2ksyf0*fer optics is:

  98.36: The critical anxk2n x+fvtc.yc5u,s)*-v xfugle 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 n fzs8hq5c046ppi r1g X with an index of refraction of n = 1.5 to material Y with an index of refraction of n = 2.0. If the speed of ligpc 6i5sz8p q10rnfg 4hht in material Y is v, what is the speed of light in material X?

  03.15: A jeweler cankk -;tu 68k dl-q(r fxhrgv9)d distinguish between a diamond and a piece of glass by observing the critical anghd8 qxk-k;(glvkd-f)u96rt rle of 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 c,rt2w i *wcvvs+c ke)8lear material. When the light makes an angle of incidenr*i w +weck,cv)82vtsce 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 las2v: w:a: hwewyer is embedded in a material of index 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 tarvwwhw:y : a2e:get. The value of n is:

  95.31: A beam of light passes from medium 1 to medium 2 to medium 3 as shown 2ku)oqw+js (u in the accompanying fjk(u wsq+)u 2oigure. What is true about the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medir99g-myul) dfb7ivxt a bt2 8;um 1 to medium 2 to medium 3 as shown in the diagram. What may be concluded abouty9t2xal) ;dmi9fvtb -7g u8rb the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray takes pase6d ))wjwu 9yhsing through three transparent materials. The indices of refraction in materials 1, 2, and 3 are n1, n2, and n3, respectively. Which of )y wjuwed96h)the following best describes the relation between the indices of refraction?

  09.34: The diagram below shows the 7wmh1 uhmbi ;0/k*eeb path taken by a monochromatic light ray traveling through three media.Thw h/i7u*mbeem; 0k1b 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 ligvr vvcb1: *n l6q3ntsc( /ne1wt+ m,dvht traveling 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 ofod4w id+hh c)7 a rectangular block of glass at dw )hdi7 +och4an 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 ai2g7 ga;.v lcl1f( ,nabo)hj rkr into a piece of glass. Which one of the labeled arrows best indicates the gg.;lavfn2)ka , ohjr7l(b1c path of the light ray after it enters the glass?

  14.44: A ray of monoc1aq ph8+g *s1m51ekb7.omparx 2ubc yhromatic light enters 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 afteap 1mo2.xh c 11qg*e7psur8+k mbbya5r it exits the glass?