Aluminum Leslie's Cube, 10 cm Sides Meters_Electrical Six ovule orientations — orthotropous

Six ovule orientations — orthotropous

Class-pack of economy handheld spectroscopes fitted with a rotating slit cap and internal diffraction grating for identifying constituent wavelengths in visible light sources

Metal spouting cylinder with multiple outlet holes at different heights

The waves generate nodes & antinodes & their full wave length or half wave length can be measured

and major vessels of the human heart

Aluminum Leslie's Cube, 10 cm Sides Meters_Electrical Six ovule orientations — orthotropousDemonstrates how surface finish affects thermal radiation, comparing the blackened, roughened, varnished, and polished faces of a water heated metal cube with an infrared sensor.