Which transitions between Bohr orbits corresponds to
(i) second line in the Balmer series and (ii) first line in Brackettt series of the hydrogen spectrum ?

Explanation

To solve the question regarding the transitions between Bohr orbits that correspond to the second line in the Balmer series and the first line in the Brackett series of the hydrogen spectrum, we can follow these steps:

### Step 1: Understand the Series
The hydrogen spectrum consists of various series based on the transitions of electrons between different energy levels (orbits). The main series are:
- **Lyman series**: Transitions to n=1 (ultraviolet region)
- **Balmer series**: Transitions to n=2 (visible region)
- **Brackett series**: Transitions to n=4 (infrared region)

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