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Q2. (a) The limits of visible spectrum are approximately 400nm to 700nm. Find the angular width of the first order visible spectrum produced by a plane grating having 1500 lines per inch when light is incident normally on the grating. (b) In a grating spectrum, which spectral line in fourth order will overlap with third order line of 5461 Aº

Q2. (a) The limits of visible spectrum are approximately 400nm to 700nm. Find the angular width of the first order visible spectrum produced by a plane grating having 1500 lines per inch when light is incident normally on the grating. (b) In a grating spectrum, which spectral line in fourth order will overlap with third order line of 5461 Aº

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Q2. (a) The limits of visible spectrum are approximately 400nm to 700nm. Find the angular width of the first order visible spectrum produced by a plane grating having 1500 lines per inch when light is incident normally on the grating. (b) In a grating spectrum, which spectral line in fourth order will overlap with third order line of 5461 A°
Transcribed Image Text:Q2. (a) The limits of visible spectrum are approximately 400nm to 700nm. Find the angular width of the first order visible spectrum produced by a plane grating having 1500 lines per inch when light is incident normally on the grating. (b) In a grating spectrum, which spectral line in fourth order will overlap with third order line of 5461 A°
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