Question

Which of the following scientists first discovered helium in the solar spectrum during a total solar eclipse?

(a) Lord Rayleigh

(b) J N Lockyer

(c) William Ramsay

(d) Antoine Lavoisier

The question was asked in an international level competition.

I'd like to ask this question from P-Block topic in section P-Block Elements of Chemistry – Class 12

Answer 1

Correct option is (b) J N Lockyer

The best I can explain: J N Lockyer first discovered helium in the solar spectrum during a total solar eclipse on 18^th August, 1868. Later on, in 1895, it was discovered on the planet Earth by a scientist named William Ramsay.