KVPY SX SB Exam 2018 Question Paper

Question : 38 of 120

Marks: +1, -0

The Hitomi satellite recently observed the Lyman alpha emission line (n = 2 to n = 1) of Hydrogen-like iron ion (atomic number of iron is 26) from the Perseus galaxy cluster. The wavelength of the line is closest to

2Å
1Å
50Å
10Å

Validate

Solution:

1/λ=R(26-1)^2(1/1^2-1/2^2)

λ ≃2Aº

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