physicsfun Magic Sun Stone: gem quality iolite shows very strong pleochroism- its color depends on the polarization of light as it is transmitted through the crystal. The color of this rough iolite gemstone changes dramatically from clear to opaque purple as the orientation of a linear polarizing filter is rotated through 90 degrees. Also known as a “Viking sky compass” since it can detect the polarization of sunlight in the sky and thereby locate the sun for navigation even on cloudy days or when the sun is below the horizon- useful for this time of year far north. ➡️ Follow the link in my @physicsfun profile for more information and where to buy a “magic sun stone” and some polarizing filters. #pleochroism#dichroism#cordierite
Hiking through the fog is a totally different experience and brings a whole new character to a day in the mountains. All you can see is the trail and forest right in front of you and the grand scenery becomes much more intimate. The air is calm and quiet, I find it to be quite relaxing.
Rocky Mountain National Park, Colorado - July 2014
This tutorial is for advanced Photoshop users that bring up quite a lot free time and have The Sims 3 installed on
their computers. The skylines are being created by sticking screenshots
from Sims 3 worlds together and warping that into a globe. Because of
this, you could also use other games with cool landscapes or real life
photos, but it probably won’t fit to the Sims 2 artstyle.
This is a fantasyscape(?) from Windy Point/Mt Lemmon. In the distance is Mt Wrightson ~40miles away. This is a 3 exposure blend, 1 for the sunset/foreground, 1 to capture the city lights and the last one for the stars. Each photo was about 30 minutes apart, so I suppose this is more of a timelapse condensed in to a still frame. I used a polarizer filter to maximize the color from the sunset, a sturdy tripod and a bowl of soup while I waited of course.
Views Along a Hiking Trail (Glacier National Park) by Mark Stevens Via Flickr: Views Along a Hiking Trail. What I wanted to capture was the vista like setting of the mountains and St Mary Lake.
This was another of those image rotations I have on my Mac desktop from past trips during a hike to St Mary Falls in Glacier National Park and another where I decided to see what I could do with some post-processing knowledge I have with Capture NX2 and Color Efex Pro. With some adjustments with adjustments to exposure to bring back some lost highlights, some use of color control points and a Low Key and Polarizing filter, I was able to bring this out as a final image…and definitely a place I really need to visit again one year soon!
It’s still hard to believe the colors that appear during a sunset at White Sands. The bright white sand reflects all the hues of the sky, making the entire landscape look surreal and otherworldly as the sun dips below the horizon. Using the new panoramic camera I finally got an image that captured the entire event from the deep blues and purples of twilight on the left to the explosive yellows and reds of sunset on the right. Even the silhouetted Organ mountains in the distance took on a unique color.
I was incredibly excited about this image as I watched the sunset happen. Only one piece of film came out with all the elements that I wanted, as the colors started to fade from the clouds during a second exposure of this scene. I’m glad it came out perfectly!
White Sands National Monument, New Mexico - March 2015
Working With Polarizing Filters: From My Physics Lab
Now we all know that
waves such as light have the property to oscillate in more than one orientation and that we call Polarization. In the gifs above I had set up a light source and two polarizing filters. Light goes thought the first filter which is set up at 0° and the other one is being rotated to find the maximum and minimum intensity of the light passing through the second filter.
The light source is giving off non-polarized light, but it gets vertically polarized as it goes through the first filter. If the second polarizing filter is set up in the same position as the first one we observe that the light passing through it will be at the maximum intensity, but as we rotate the second filter the intensity of the light drops down to a minimum when we reach the position in which the filters are perpendicular to each other. (in this case, a 90° rotation)
This was one of the highlights from my travels this autumn. I found this spot a couple hours before sunset and figured I’d set up and wait for light. I had the place all to myself, but It was mostly cloudy out so I didn’t know what to expect. After a while of waiting the sky started dumping rain on me, but I put on the rain gear and enjoyed the solitude. Right as the rain was getting to its strongest, I noticed the sky brightening up so I had a glimmer of hope that something would happen. Then suddenly a double rainbow appeared and stayed incredibly brilliant for almost 5 minutes! I watched the light come and go on the aspens and found this to be the perfect time to take the shot.
Shot Notes: Velvia 50 4x5, 75mm Super Angulon 2 seconds at f22, polarizing filter and 2 stop soft GND filter
of a middle-aged woman dressed in
business casual says, three dead plane crash-landed
on the 73-N freeway. A bird
flying through its daily sky
will, from some atmospheric disturbance
spiral to its death mid-afternoon.
The channel will be changed. A young boy will
amuse himself poking a dead bird with a stick.
These are the facts of life.
Still I linger on the video footage
of dismembered metal, faces of strangers.
Tell myself they will feel the weight
of my furrowed eyebrows
through the liquid crystal display
glass plates polarizing filters of my
television screen. Still I linger
for just a few more seconds
on the sight of some dead animal on the sidewalk
contemplating its fate,
knowing I am, too,
a traveler and
Technique Shows Energy Dissipate from Projectile Impacts
There’s no reason to read more deeply into the following results of a Duke University physics experiment: When it comes to slamming objects into the ground, harder and faster doesn’t necessarily translate to deeper penetration.
Researchers at the university have been working to understand what happens underground when a meteor or missile strikes earth. They developed a technique to get a slow-motion view of energy dissipating through simulated sand and soil when a metal projectile is dropped on the two different media. Revealing a counterintuitive truth about the physics of colliding objects, their work shows that projectiles experience more resistance when they hit the ground at faster speeds and stop sooner than expected because of it.
The physicists used clear plastic beads that transmit light differently depending on whether they are compressed or relaxed. By putting a polarizing filter on a slow-motion camera, they were able to record impact energy moving through a pit filled with the beads in transmitted lines called force chains.