Quantum Effects Topic

UV light from a mercury lamp discharges a negatively charged zinc plate but not a positively charged one, demonstrating the photoelectric effect. Students see that only photons above the threshold …

Demonstrates photovoltaic energy conversion using a solar cell to power a toy oil rig from a lamp. Students observe the conversion chain from light to electrical to mechanical energy. The …

Demonstrates frustrated total internal reflection (FTIR) as a classical analog to quantum tunneling. Tightening a clamp reduces the air gap between two prisms until evanescent waves couple across, allowing laser …

Demonstrates the wave nature of electrons by showing diffraction rings from a polycrystalline graphite target. Students observe direct evidence for de Broglie's hypothesis and can verify quantitatively by varying the …

Laser light diffracting through a helical coiled filament produces an X-shaped pattern analogous to the famous "Photo 51" X-ray diffraction image of DNA. Students see how helical geometry produces distinctive …