[In-Depth Description]

[M | t | ★★ ] | keywords: single slit diffraction, Uncertainty Principle.

Adjustable single slit diffraction; spatial localization (by slit) results in momentum spread of photons. 

[In-Depth Description]

[M | t | ★★ ] | keywords: frustrated total internal reflection (FTIR), tunneling, barrier penetration

(Frustrated Total Internal Reflection) To reflect or not to reflect at the interface of two prisms in intimate contact? Adjust the potential barrier. 

[In-Depth Description]

[L | t++ | ★★★ ] | keywords: resonance, normal modes of vibration, two-dimensional standing waves, harmonics
Electromagnetically driven plate to show two dimensional modes of vibration.

[In-Depth Description]