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A laser beam of unknown wavelength passes through a diffraction grating having 5460lines/cmafter striking it perpendicularly. Taking measurements, you find that the first pair of bright spots away from the central maximum occurs at ±15.2? with respect to the original direction of the beam.

What is the wavelength of the light? in nm

At what angle will the next pair of bright spots occur?

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Reference No.:- M91024001

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