Suppose that in any Bohr atom or ion, orbits are only in even numbers like 2, 4, 6, ... The maximum wavelength of radiation emitted in the visible region of H-spectrum should be

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Canvas Classes · Accepted Answer

Step 1: Available orbits

Only even orbits:

Step 2: Visible region = Balmer series

In normal H-spectrum, Balmer series has . With only even orbits, the lowest available orbit is , and the next is .

Step 3: Maximum wavelength = minimum energy transition

Minimum energy transition in visible region:

Final Answer:  → Option (d)

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