Crookes Radiometer Special Category for UNBK5-5P 1 x Dusting brush -

1 x Dusting brush - Nylon dusting brush with plastic handle

1D/2D Imager SR(N6603)

Speed 200mm/sec

Interface USB-C

Excellent Noise Cancelling Effect (Microphone)

Crookes Radiometer Special Category for UNBK5-5P 1 x Dusting brush -A beautiful desk gadget or serious educational toy, the Crooke's Radiometer demonstrates that light has energy, and will turn its vanes even when illuminated by a torch. Despite many people thinking that the motion is caused by the impact of photons on the vanes, the Radiometer in fact operates as a heat engine, driven by the different temperatures of the black and silver vanes. Features: One piece glass body with metal vanes Use as simple desk