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What order is necessary to resolve 647.98-nm and 648.07-nm spectral lines using a 4500-line grating?

What order is necessary to resolve 647.98-nm and 648.07-nm spectral lines using a 4500-line grating?

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What order is necessary to resolve 647.98-nm and 648.07-nm spectral lines using a 4500-line grating?
Transcribed Image Text:What order is necessary to resolve 647.98-nm and 648.07-nm spectral lines using a 4500-line grating?
Expert Solution
Concept and Principle:
  • Diffraction is defined as the bending of light around obstacles whose size is comparable to the wavelength of the light. A diffraction grating is capable of splitting a single beam of light into multiple beams based on the wavelength.

 

  • The resolving power of a grating is its ability to ability to spatially separate two wavelengths, It is given by,

λΔλ=mN

Where λ is the minimum resolvable wavelength, ∆λ is the difference in wavelength, m is the order of the dispersion, and N is the number of lines in the grating.

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