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(a) (i) briefly describe binding energy ...

(a) (i) briefly describe binding energy per nucleon.
(ii) In a certain star, three alpha particles undergo fusion in a single reaction to form `._(6)^(12)C` nucleus. Calculate the energy released in this reaction in MeV.
Given : `m(._(2)^(4)He) =4.002604 u` and `m.(._(6)^(12)C)=12,000000u`.
(b) wavelength of the `1`st line `(H_(alpha))` of Balmer series of hydrogen is `656.3` nm. Find the wavelength of its `2` nd line `(H_(beta))`.

Text Solution

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Use the relation `(1)/(lambda)=R((1)/(n_(1)^(2))-(1)/(n_(2)^(2)))` for `alpha` and `beta`.
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