I prolly already have this pic posted somewhere, but I decided to give it a different look.
Say hello to my little friend. His name is Silas.
Iridescent surfaces, such as butterfly wings, help animals to elude potential predators. When these insects fly, the upper surface of their wings continually changes from bright blue to dull brown because the angle of the light striking the wing changes. As the butterflies move their wings up and down during flight, they seem to disappear, and then reappear a short distance away, looking like ethereal flashes of bright blue light. The dark undersides of their wings strengthen this effect. Combined with an undulating pattern of flight, this ability to change color quickly makes them difficult for predators to pursue.
The wings of butterflies and moths consist of a colorless translucent membrane covered by a layer of scales (the name of the order is Lepidoptera, meaning “scaly wings”). Each scale is a flattened outgrowth of a single cell and is about 100 µm long and 50 µm wide. The scales overlap like roof tiles and completely cover the membrane, appearing as dust to the naked eye.
The iridescence is caused by multiple slit interference. Sunlight contains a full range of light wavelengths. “Interference” occurs when light hitting the wing interacts with light reflected off the wing.
Light is a wave. If the crests and the troughs of the waves are aligned, or in phase, they will cause constructive interference, and iridescence is the result. One light wave hits the first groove, and a second light wave travels half of a wavelength to another groove, and is then reflected back in phase with the first.
If the crest of one wave meets the trough of another wave (out of phase), they will cancel each other out, as destructive interference occurs.
do you think God ever gets sad like “what do you mean you don’t love yourself i worked so hard on you….”
…why is this so uplifting
I’m not even religious and this makes me smile.
My mum says this to me , I think she is actually insulted when I complain about myself
LifeStraw purifies water instantly and inexpensively: it is a solution that can provide millions of under-privileged people with safe drinking water.
reblogging again because science
Seriously, Science. Do your thing.
IT’S ONLY 20$.
OH MY GOD
I’VE BEEN WAITING FOR TUMBLR TO GET WIND OF THIS
I’ll always signal boost this because not only does this work for people in under privilege areas it’s also proof of human ingenuity.
Really, we kids that grew up in the early 90s were all told about how we had to conserve water because drinkable water was such a rare resource and people in foreign lands were basically fucked up the ass because there was no way for them to get drinking water. 20 years and 20 bucks later one of the biggest problems humanity faced is a non issue. THAT’S FUCKING CRAZY!
Somebody should start one of those online donate things where people can donate money to buy these to send to areas with unsafe drinking water. But somebody other than me should do it because I don’t know how to do that kind of thing or get the word out.
this is amazing
Beautiful sunset after practice (at Amon G. Carter Stadium)