the goal:

The hydrogen atom discrete spectroscopy

Materials and tools:

Hydrogen gas electrical discharge tube - triple glass prism - white screen - two vertical micro-slits opposite each other - metal rod - connecting wires

Steps:

1-Connect the positive terminal of the voltage source to the base of the electrical discharge tubes using the connecting wires.

2-Connect the negative terminal of the voltage source to the metal rod using the connecting wires.

3-Place the vertical slits, prism, and white screen in a straight path.

4-Now adjust the voltage source 10 KV.

5-Bring the metal rod close to the electrode tube and see what happens.

Note:

1- We notice the emission of light from the electrical discharge tube passing through the vertical slits

2- Observe the analysis of light by the glass prism

3- We notice that 4 colored lines are separated by dark areas on the fluorescent screen

Conclusion:

The spectrum produced by the electrical discharge of gasses is linear or discrete

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