A student measured the wavelength produced by a sodium vapour lamp, directing the light through two slits with a separation of 0.15 mm. An interference
A student measured the wavelength produced by a sodium vapour lamp, directing the light through two slits with a separation of 0.15 mm. An interference pattern was created on the screen 3.0 m away. The student found that the distance between the first and eighth consecutive dark lines was 8.0 cm. What was the wavelength of the light emitted by the sodium vapour lamp? [5 marks]
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