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a double- slit interference experiment is performed with two very narrow slits separated by 0.15 mm. the experiment uses red light with a wavelength of 600 nm and projects the interference pattern onto a screen 7.5 m away from the slits.

(a) what is the distance between two nearby bright fringes on the screen?

(b) what is the distance between two nearby dark fringes on the screen? assume these fringes are all near (theta = o).

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