194
Question
Which of the following element was discovered by study of Fraunhofer lines
Which of the following element was discovered by study of Fraunhofer lines
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Solution
The correct option is C Helium
The first noble gas to be discovered was helium by Lockyer in 1869. Spectroscopic investigations of the Sun's chromosphere during a solar eclipse in India revealed a previously unobserved line , close in wavelength to the D1 and D2 Fraunhofer lines of sodium. The new line was assigned D3 and the element it represented was helium.
The first noble gas to be discovered was helium by Lockyer in 1869. Spectroscopic investigations of the Sun's chromosphere during a solar eclipse in India revealed a previously unobserved line , close in wavelength to the D1 and D2 Fraunhofer lines of sodium. The new line was assigned D3 and the element it represented was helium.
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