Question: White light is passed through a double slit and interference pattern is observed on a screen 2.5 m away. The separation between the slits

White light is passed through a double slit and interference pattern is

White light is passed through a double slit and interference pattern is observed on a screen 2.5 m away. The separation between the slits is 0.5 mm. The first violet and red fringes are formed 20 mm and 3.5 mm away from the central white fringe. Calculate the wavelengths of the violet and the red light.

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