choose correct option and explain
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is the answer for this question is 1?
bhai2194:
no the answer is 3 option
i want to explain it
the number of lines emitted from xth energy level
= 1 + 2 + 3 +………… n – 1 = ∑(x – 1)
∑x = x(x+1)/2
Thus, ∑ (x – 1) = ( x-1) (x-1+1)/2 = (x-1) (x)/2
Number of spectral lines that appear in spectrum when an electron jumps from xth energy level = x (x-1)/2
= 1 + 2 + 3 +………… n – 1 = ∑(x – 1)
∑x = x(x+1)/2
Thus, ∑ (x – 1) = ( x-1) (x-1+1)/2 = (x-1) (x)/2
Number of spectral lines that appear in spectrum when an electron jumps from xth energy level = x (x-1)/2
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Ur answer is B...
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