Question

atomic spectra of hydrogen and Bohr theory ​

Answer 1

Explanation:

ATOMIC SPECTRA OF HYDROGEN

Let us pass electric current through the discharge tube. The gas emits blue light, because the atoms of hydrogen gas gain energy from the current and get excited. When the excited atoms return to the normal state, they emit energy, in the visible region, which appears blue. If this blue light is passed through a prism, the light breaks into 5 colours apearing as lines of four colours. This is known as the line emission spectrum of hydrogen.

When the spectrum of investigated in infra red and ulltraviolet regions, more lines were found, which were given different names. Such as, Lyman, Balmer, Paschen, Brackett and Pfund series.

BOHR THEORY

Bohr proposed his atomic model based on the quantum theory of radiation. His main postulates were :An electron can revolve around a nucleus not in an random orbit but only in certain definite circular orbit having a well defined energy.

These orbits are called as stationary orbits.When travelling in a stable orbit with lowest energy, an electron emits no electromagnetic energy.Emission or absorption of energy takes place when an electron jumps from one stationary orbit to another.

The difference in energy is related to the frequency of the radiation absorbed or emitted. With this model he explained characteristic spectra of different atoms and other properties. It was possible to calculate the hydrogen atom spectrum with this model.

Answer 2

Explanation:

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$\text { This is Twilight Astro}$

When electric discharge is passed through gaseous hydrogen the electrons in atoms absorbs energy. They jump into higher orbit . And then came back to lower orbit again.

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@ Twilight Astro ✌️☺️

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