Solving a problem in physics section 2 point 53 optics

Solving a problem in physics section 2 point 53 optics

53. In light of the diffraction grating white light spectra of the second and third orders partly overlap. At what wavelength in the spectrum of the second order is imposed purple border (λ = 0,4mkm) third-order spectrum?

Additional information:

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)

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