For the study of such interactions leading to changes in the optical properties of photonic crystals, a high-intensity emitting medium such as high-energy lasers is required.
# what a beautiful, beautiful ride # don t know where i m in five, but i m young and alive. # hello again. whereas england and wales saw some rain to start the day, in northern scotland, it was dry. and we had some stunning weather watcher pictures sent to us showing us these sun halos, sun pillars and upper tangent arcs. these are all optical phenomena caused by ice crystals high in the earth s atmosphere reflecting and refracting sunlight, but some of them have been stunning today. some of that high cloud is on the satellite picture just here, but our eye is drawn
of modestly armed fighters. afghanistan, so long the site for proxy wars between nations, militias, and terrorist groups, faces a new chapter in its turbulent history. hello again. whereas england and wales saw some rain to start the day, in northern scotland it was dry. and we had some stunning weather watcher pictures sent to us showing us these sun halos, sun pillars and upper tangent arcs. these are all optical phenomena caused by ice crystals high in the earth s atmosphere reflecting and refracting sunlight, but some of them have been stunning today. some of that high cloud
hello again. whereas england and wales saw some rain to start the day, in northern scotland it was dry. and we had some stunning weather watcher pictures sent to us showing us these sun halos, sun pillars and upper tangent arcs. these are all optical phenomena caused by ice crystals high in the earth s atmosphere reflecting and refracting sunlight, but some of them have been stunning today. some of that high cloud is on the satellite picture just here, but our eye is drawn to this area of low pressure to our south west. it s this that s going to be bringing exceptionally mild air over the next few days behind this warm front. and across england, temperatures could get close to the national record for december, which currently stands at 17.7. we re likely to get around 17 degrees over the next few days. the average for december is just eight, so these temperatures