Ch 35 Relevant Concept Questions

Ch 35 Relevant Concept Questions - of closely spaced slits...

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University Physics Young and Freedman Chapter 35 Concept Questions and solutions Chapter 35: Pre-Chapter Question Q: How thin must an oil film be to show a rainbow? A: Explained in 35.7. Must be no more than a few wavelengths of light in thickness 1. On a copy of Fig. 35.3, draw the nodal curves that lie between the antinodal curves shown in the figure. To which value of m in Eq. (35.2) does each nodal curve correspond? The nodal curves have the same shaped as the antinodal curves but lie between them. From top to bottom, the nodal curves correspond to m = 2, 1, 0, -1, -2, and -3 in Eq. (35.2). Note that the m = -3 nodal curve passes through point c. 2. You shine a tunable laser (whose wavelength can be adjusted by turning a knob) on a pair
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Unformatted text preview: of closely spaced slits. The light emerging from the two slits produces an interference pattern on a screen like that shown in Fig. 35.6. If you adjust the wavelength so that the laser light changes from red to blue, how will the spacing between bright fringes change? Blue light has a shorter wavelength than red light. Eq. 35.6 tells us that the distance Ym from the center of the pattern to the mth bright fringe is proportional to the wavelength λ. Hence all of the fringes will move toward the center of the pattern as the wavelength decreases, and the spacing between the fringes will decrease....
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This note was uploaded on 04/18/2008 for the course PHYS 0030 taught by Professor Cutts during the Spring '07 term at Brown.

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