Critical angle Student activity Play

Dark-field light path Animation Play

Definition of the metre Animation Play

Deflection of a beam of light Animation Play

Density and the speed of light Student activity Play

Density and the speed of light Animation Play

Derivation of the formula Animation Play

Derivation of the formula Animation Play

Describing class intervals Student activity Play

Describing class intervals – speed of light Whiteboard exercise Play

Determination of object size using the light microscope Whiteboard exercise Play

Determination of object size using the light microscope Student activity Play

Diagrams of eclipses Whiteboard exercise Play

Differences between terrestrial and aquatic environments Student activity Play

Different receptors for different stimuli Student activity Play

Diffraction Animation Play

Diffraction Chart Play

Diffraction Whiteboard exercise Play

Diffraction Student activity Play

Diffraction and interference Class activity Play

Diffraction and interference Whiteboard presentation Play

Diffraction and interference Class activity Play

Diffraction and interference Whiteboard presentation Play

Diffraction grating Animation Play

Diffraction grating Whiteboard exercise Play