Pages

Tuesday, November 4, 2014

Ice and magnetism – a view through the microscope

Water is a diamagnetic material, which means, it is reacting in magnetic fields. This is a simple experiment to see how a magnetic field influences ice crystals during freezing; water was dropped on a microscope slide that was placed on neodymium magnets and frozen by -25°C. The photos are made with a cooled polarization microscope with the 10x objective and a 2,5x photo adapter. Under the microscope, the ice crystals show completely different habit than “normal” ice crystals. They are smaller, partly cubic or with an irregular shape.

ice under the microscope and in a magnetic field
Ice crystals under frozen ina magnetic field.


cubic ice under a microscope and in a magnetic field
Small cubic crystals formed near the magnetic pole.

irregular ice under a microscope and in a magnetic field
Irregular crystals formed in the magnetic field.

irregular ice under a microscope and in a magnetic field

ice crystals under the microscope
For comparison, these are ice crystals frozen without a magnetic field. 


Thursday, October 30, 2014

Maior cajueiro do mundo

It looks like a forest, but it's only one tree. This cashew tree grows in the Brasilian county Rio Grande do Norde near the city Natal. People said it is the biggest cashew tree inn the world and it vovers an area of approximmataly 8000 square meters.

Maior cajueiro do mundo or Cajueiro de Pirangi
The top of  Maior cajueiro do mundo.


Maior cajueiro do mundo or Cajueiro de Pirangi
Inside the tree.

 the Maior cajueiro do mundo or Cajueiro de Pirangi

Linked with Skywatch Friday.

Tuesday, October 28, 2014

Crested Tits

Crested Tits are common forest birds, but they live hidden in forests. I had the luck to see a small flock and get one in front of my camera.

Haubenmeise (Lophophanes cristatus)

Haubenmeise (Lophophanes cristatus)

Linked with Wild Bird Wednesday.

Friday, October 24, 2014

Bork Beetle Tracks

Bork beetles are pain for trees, but there traces have interesting structures.

Borkenkäferspuren in Fichtenholz

Borkenkäferspuren

Linked with The Weekend in Black and White
Related Posts Plugin for WordPress, Blogger...