일반물리학 2 — Interference: Problem 62

62 In a double-slit experiment, the fourth-order maximum for a wavelength of 425 nm occurs at an angle of \(\theta = 90^\circ\). (a) What range of wavelengths in the visible range (400 nm to 700 nm) are not present in the third-order maxima? To eliminate all visible light in the fourth-order maximum, (b) should the slit separation be increased or decreased and (c) what least change is needed?