Coherent light with wavelength 609nm passes through two, Ask an Expert

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Q. Coherent light with wavelength 609nm passes through two very narrow slits, and the interference pattern is observed on a screen a distance of 3- {rm m} from the slits. The first-order bright fringe is a distance of 4.84 {rm mm} from the center of central bright fringe.

Q. A 120 g air-track glider is attached to a spring. The glider is pushed in 10.0 cm and released. A student with a stopwatch finds out that 8 oscillations take 14.50s. What is the spring constant?

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