Twin paradox Animation Play

Two mirrors Animation Play

Two mirrors Animation Play

Types of display devices Slideshow Play

Types of ecosystems Whiteboard exercise Play

Types of ecosystems Student activity Play

Types of phototropism Simulation Play

Umbra and penumbra Whiteboard exercise Play

Umbra and penumbra Student activity Play

Untypical sources of light Slideshow Play

Useful and wasted energy in domestic appliances Animation Play

Useful energy and wasted energy Student activity Play

Uses of light emitted by atoms Animation Play

Uses of the noble gases Student activity Play

Uses of transition metal complexes Student activity Play

Uses of UV/visible spectrometry: colorimetry Student activity Play

Variable resistors and nonlinear resistors Class activity Play

Variable resistors and nonlinear resistors Whiteboard presentation Play

Variables and cases Student activity Play

Various colours of LED diodes Simulation Play

Various colours of LED diodes Student activity Play

Various colours of LED diodes Whiteboard exercise Play

Virtual image Whiteboard exercise Play

Virtual image Student activity Play

Visible light and UV Slideshow Play