Quiz on Einstein's Quantum Theory of Radiation

What is Planck's law primarily associated with in Einstein's theory?

• The emission of sound waves

• The absorption and emission of electromagnetic radiation

• The generation of thermal energy

• The reflection of light

Which physicist is known for the mass-energy equivalence formula E=mc²?

• Max Planck

• Niels Bohr

• Albert Einstein

• Isaac Newton

What does stimulated emission contribute to in laser systems?

• Sound production

• Increased energy loss

• Light amplification

• Heat generation

What is the lifetime of the metastable intermediary level of energy E2 in the laser process?

• 1 μs

• 1 ms

• 10 ns

• 100 μs

What phenomenon occurs when electrons accumulate in the metastable state E2?

• Thermal equilibrium

• Quantum tunneling

• Population inversion

• Photon scattering