Quantum Mechanics | The Hydrogen Line Spectrum

The video tutorial explains the hydrogen emission spectrum experiment, where hydrogen gas in a discharge tube is activated by an electric current, causing it to emit light. This light, when passed through a prism, shows discrete spectral lines, indicating quantized energy levels. The experiment is replicated with other elements like sodium and helium, confirming that energy is quantized, not continuous. Historical experiments like the ultraviolet catastrophe and photoelectric effect are linked to the development of quantum mechanics. The video concludes by suggesting further exploration of quantum mechanics postulates.

What happens to hydrogen gas when an electric current is passed through it in a discharge tube?

• It emits a continuous spectrum of light.

• It emits discrete spectral lines.

• It absorbs all light.

• It remains inactive.

What does the hydrogen emission spectrum demonstrate about energy levels?

• Energy levels are continuous.

• Energy levels are quantized.

• Energy levels are infinite.

• Energy levels are random.

Which of the following elements also shows discrete energy levels similar to hydrogen?

• Carbon

• Helium

• Oxygen

• Nitrogen

Which historical experiment is associated with the development of quantum mechanics?

• The Rutherford gold foil experiment

• The Michelson-Morley experiment

• The photoelectric effect

• The double-slit experiment

What is a key concept introduced by the hydrogen emission spectrum in quantum mechanics?

• Random energy fluctuations

• Discrete energy values

• Continuous energy distribution

• Infinite energy levels