Multiple choice

In the solar spectrum, presence of D-line of the Fraunhofer lines prove that ________.

  1. there is no sodium in the sun

  2. there is no sodium in the outer surrrounding region of the sun

  3. there is no sodium in the inner core of the sun

  4. there is no sodium in the outer surrounding
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Fraunhofer D-lines are dark absorption lines in the solar spectrum caused by sodium in the sun's outer atmosphere (photosphere/chromosphere). These cooler layers absorb specific wavelengths, creating dark lines in the otherwise continuous spectrum.

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