Name the spectral lines of the atomicspectrum of hydrogen which appear inthe visible region.

To answer the question, we need to understand the atomic spectrum of hydrogen and the visible region of the electromagnetic spectrum.

1. Atomic Spectrum of Hydrogen: The atomic spectrum of hydrogen refers to the specific wavelengths of light that are emitted or absorbed by hydrogen atoms when they undergo transitions between different energy levels. These transitions result in the emission or absorption of photons, which can be observed as spectral lines.

2. Visible Region: The visible region of the electromagnetic spectrum refers to the range of wavelengths that are visible to the human eye. It spans from approximately 400 to 700 nanometers (nm), with violet light having the shortest wavelength and red light having the longest wavelength.

Now, let's identify the spectral lines of hydrogen that appear in the visible region:

3. Balmer Series: The Balmer series is a set of spectral lines in the atomic spectrum of hydrogen that appear in the visible region. These lines are produced when electrons in hydrogen atoms transition from higher energy levels to the second energy level (n=2). The Balmer series includes the following spectral lines in the visible region:

• H-alpha (656.3 nm): This is the red spectral line.
• H-beta (486.1 nm): This is the blue-green spectral line.
• H-gamma (434.0 nm): This is the violet spectral line.
• H-delta (410.2 nm): This is the violet-blue spectral line.

These are the main spectral lines of hydrogen that appear in the visible region.