Tag: the electromagnetic spectrum

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Multiple choice physics spectra the electromagnetic spectrum electromagnetic spectrum electromagnetic waves

The electron in hydrogen atom in a sample is in $n^{th}$ excited state, then the number of different spectrum lines obtained in its emission spectrum will be:

  1. $1 + 2 + 3 + ..... + (n - 1)$
  2. $1 + 2 + 3 + ..... + (n)$
  3. $1 + 2 + 3 + ..... + (n + 1)$
  4. $1$ x $2$ x $3$ x ..... x $(n - 1)$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When an electron transitions from the n-th excited state (which corresponds to principal quantum number n + 1, or generally considering n as the level), the total number of spectral lines emitted during transitions to lower states is given by the sum from 1 to n.