Now this is HOT. A high quality Fresnel lens melts brick.
“Continue reading” for details of this powerful “magnifying glass”.
Continue reading
Fresnel lens
Leave a reply
Tag Archives: google
Lemon Lights
Electricity + Lemons = Light. Stick two electrodes in the lemon with something around mains voltage at a couple of amps or more and it starts to sparkle.
“Continue reading” for unusual light formed by electricity and – you guessed it – lemons. Continue reading
Tektites
A gigantic meteorite impact 800,000 years ago threw this impact melted rock into space where it rained back to Earth as Tektites. These Tektites were collected by my uncle in Australia deserts some 30 years ago.
“Continue reading” for more information about these space travellers.
Continue reading
Crookes Radiometer
This is a Crookes Radiometer. An old physics department staple. What does it do? On exposure to light or heat, the vanes turn on a low friction mount. Here a green laser (14 mW green and 9 mW infrared) starts it turning.
“Continue reading” for more on this interesting science toy.
Continue reading
Ultraviolet
Ultraviolet becomes visible when it makes things fluoresce. Tonic water under ultraviolet (UV) glows blue due to the Quinine content. Fluorescein glows green. “Continue reading” to see the effects of UV and the ways it is created. 10 photos and links. Continue reading
Wide Angle Sparks
Sparks here jump directly onto the protective camera cage. and the wide angle lens captures most of the 7 foot spark on the right. The left spark jumps to an aluminum tube just a foot or two in front of the camera. It is a 6 second exposure.
See my Google+ post.
Photo Date: 2009