Question: A laser is directed through a double slit appartus where the slits are 0 . 2 5 mm apart. The interference patteren on the screen

A laser is directed through a double slit appartus where the slits are 0.25 mm apart. The interference patteren on the screen 7.50 m away has its third minimum 4.39 cm from the right bisector position (central maximum). What is the wavelength and colour of the laser?

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