Chapter 35: Q7P (page 1074)
The speed of yellow Light (from a sodium lamp) in a certain liquid is measured to be . What is the index of refraction of this liquid for the Light?
The index of refraction of the liquid is
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In Fig. 35-34, a light ray is an incident at angle on a series of five transparent layers with parallel boundaries. For layers 1 and 3 , , , and . (a) At what angle does the light emerge back into air at the right? (b) How much time does the light take to travel through layer 3?
The figure shows the design of a Texas arcade game, Four laser pistols are pointed toward the center of an array of plastic layers where a clay armadillo is the target. The indexes of refraction of the layers are and . The layer thicknesses are either 2.00 mm or 4.00 mm, as drawn. What is the travel time through the layers for the laser burst from (a) pistol 1, (b) pistol 2, (c) pistol 3, and (d) pistol 4? (e) If the pistols are fired simultaneously, which laser burst hits the target first?
In Fig. 35-31, a light wave along ray reflects once from a mirror and a light wave along ray reflects twice from that same mirror and once from a tiny mirror at distance from the bigger mirror. (Neglect the slight tilt of the rays.) The waves have wavelength 620 nm and are initially in phase. (a) What is the smallest value of that puts the final light waves exactly out of phase? (b) With the tiny mirror initially at that value of , how far must it be moved away from the bigger mirror to again put the final waves out of phase?
Figure 35-40 shows two isotropic point sources of light (and ) that emit in phase at wavelength 400 nm and at the same amplitude. A detection point P is shown on an x-axis that extends through source . The phase difference between the light arriving at point P from the two sources is to be measured as P is moved along the x axis from out to .The results out to are given in Fig. 35-41. On the way out to , what is the greatest value of x at which the light arriving at from is exactly out of phase with the light arriving at P from ?
Figure 35-24a gives intensity versus position on the viewing screen for the central portion of a two-slit interference pattern. The other parts of the figure give phasor diagrams for the electric field components of the waves arriving at the screen from the two slits (as in Fig. 35-13a).Which numbered points on the screen bestcorrespond to which phasor diagram?
(a) Figure 1
(b) Figure 2
(c) Figure 3
(d) Figure 4
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