11.24: Two wave pulses travel g+r/0xs 7f3)pg gz odhto 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 /pgg +0f)sr7gd ozxh3 represents the superposition of the pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes through the air anmpfi:+/5c hm jd8g 6vad strikes the surface of a plastic block. Which pair of statements correctly describes the phase changes for the reflected wave and the transmicgv5 m 6/h:8jpdif+amtted wave?

  12.02: A ray of light passes straight downward through the point labeled B in s ecwpux9zh2b4dj9b h 9a7(1qthe diagram shown. The 9qzjp9hc4 xuw(h71 a9e bs bd2ray 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 whenever9c2btj+fhe w rrgq0-9 light is incident on

  05.18: A student hold a hand mirror to observe the back of her head while standipb 4lvt jsnup(jkx660*a7z2 g ng 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 hand mirror 1 ft behind her head, she will see the back of her head how p*lkx sgu( p6vzn042j 7a 6btjfar behind the wall mirror?

  14.25: It is observed 9 t9z.18b6btbp3ha 37cg.f tr dat lyethat a light ray changes direction when it enters a new material. Which one of the following choices is the term best associydr ge. pbhl3 t c1t3b97 9tztaa8b.f6ated with this phenomenon?

  96.19: Light that has wavgcyrxe;m ih,bhj08z1)e8h, d9kde4 yelength of 500 nm in air has wavelength 400 nm in a transparent material. What is the index of refraction of the material;)9 k4 ,g0ehed 8ychbjrid ,ez81mxyh?

  98.04: As sound travels from steel into air, both its speed and itu f,ng1 f2/o6ed5ur nzur,c z1s:

  00.01: As a wave moves from one mediu ujj +og -f8nly8z:pk9m to a second medium with a different index of refraction which of the follk9jyu l+p jg:n8z8- foowing wave properties would NEVER change?

  05.47: A sound wave generated from a tunaqsjnu l +5g9,r2y4 2i 5wotzzing 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 the wavelength and frequency9 4z2t su g2w ojn+5zqi,5ayrl of the sound as it passes from air to rock?

  14.28: A waterproof speaker placed at the bottom of a snlu 53beqnu1+wimming pool emits a sound wave that travels t13qn ueln+5uboward 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 lightow wbsb+u0t)0frn* r4 strikes a rectangular glass block with an angle of incidence ofw sou 4tn+00fb)* rwbr $0^0$. 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 .88vga* m- q4qwytm oxa boundary as shown to the right. Whiwoq84x tg.y8 -ma*qvmch segment best represents the refracted ray?

  98.17: Which diagram best represents what happens to a svb 1tje-f, /dray of light entering air from water? Air is at the top /fb, vj1-setd in all diagrams.

  94.11: The critical angle of a material is the 9; v 7hjmbidi,o m.x9g 99y6d hmswb3aangle of incidence for which the m999mg b;diwxa,hj.6 sv mbdoiy79 h3angle of refraction is:

  95.12: The principle underlying fiber optyf e1gp+3q; f tx4-yowics is:

  98.36: The critical angle in a tf8 eboknc -+j y)g8l8h,, nuamransparent 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 an index of refraction ua az90ft/d2kof n = 1.5 to material Y with an index of refra 0az/ua 2kd9ftction 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 between a diamond and a piece of glass by42yp sh2ki :nn observing the critical angle of the light in each material. Glass with a4s2y :knp2 ihnn 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 light73z3bk s7g4qx enk43k bg 4lyo makes an angle 3qgknx 4kk774yz3e sl3gob b4 of 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 . r kyk+mri0g,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 ,rrk0+my k gi.laser and target. The value of n is:

  95.31: A beam of light passes from mediunet,le70j)s o m 1 to medium 2 to medium 3 as shown in the accompanying figure. What is true about the respective indices of refraction (n1, n2, and n3)? osne) l,7j0t e

  00.14: A beam of lightxqy;n 7y0g ys: passes from medium 1 to medium 2 to medium 3 as shown in the diagram. What may be concl;y:sygy 7q0x nuded about the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that aixe )6ojpei(4 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 rii ejo)x4 p(e6elation between the indices of refraction?

  09.34: The diagram below shows the path taken by a monocha2 8xzwx/ dlvp6d 9x2jromatic light ray traveling through three media.The symb92d6/ az 8ljxpv 2xdwxols $v_1$,$\lambda_1$ , 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 travelinvx;6vzk397 a9q qumk yjoe 2+lg 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 incpsys 5 7i jtxiz-hg/vabd2g;7,5mj)iident on the surface of a rectangular block of glass amyij5i)dj;/v7 zi,a72 h spt gbsg- x5t an 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 transm sng9;5err -fhxr*sq3itted from air into a piece of glass. Which one of the labeled arrows best indicates the path of the light ray after it enters the gerqf9hns s3-xr*;r g5 lass?

  14.44: A ray of monochromatic light enters th(nw+zdw,32g hyn(ol qe 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 d2gwn (,z lo+ yw3hq(nthe path of the light after it exits the glass?