Question

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(Q)--green line of mercury spectrum has a wavelength of 5430 angstrom. what is the wavelength the nanometre
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Answer 1

Diagram with spectral ⤴️⤴️⤴️

Theory For Understanding wavelengths ⤵️

At left is a mercury spectral tube excited by means of a 5000 volt transformer. At the right of the image are the spectral lines through a 600 line/mm diffraction grating.

The prominent mercury lines are at 435.835 nm (blue), 546.074 nm (green), and a pair at 576.959 nm and 579.065 nm (yellow-orange). There are two other blue lines at 404.656 nm and 407.781 nm and a weak line at 491.604 nm.