ScienceIQ.com

What Is Polarimetry?

Polarimetry is the technique of measuring the 'polarization' of light. Most of the light we encounter every day is a chaotic mixture of light waves vibrating in all directions. Such a combination is known as 'unpolarized' light. When you turn on a lamp, for example, the light waves vibrate in all directions: up and down, side to side, or at any ...

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WhatIsPolarimetry
Geology

Crater Lake

Crater Lake: overwhelmingly yet sublimely beautiful. Moody. At times brilliantly blue, ominously somber; at other times buried in a mass of brooding clouds. The lake is magical, enchanting - a remnant ... Continue reading

CraterLake
Astronomy

The First Starlight

Imagine being able to see our Universe 14 billion years ago when it was just a baby. If we had a time machine, we could go back and watch how its infant features emerged after the Big Bang. There are ... Continue reading

FirstStarlight
Geology

How Do We Predict The Climate--100,000 Years Ago?

Since the only ice age that occurred during human existence ended 10,000 to 12,000 years ago, how can we know today that several major ice ages occurred during earth's history? How do we know how much ... Continue reading

PredictTheClimate
Engineering

How We Use Crystals To Tell Time

Quartz clock operation is based on the piezoelectric property of quartz crystals. If you apply an electric field to the crystal, it changes its shape, and if you squeeze it or bend it, it generates an ... Continue reading

Crystals

Lionfish Invasion

LionfishInvasionLionfish (Pterois volitans/miles complex) are beautiful, yet venomous, coral reef fish from Indian and western Pacific oceans that have invaded East Coast waters. Ironically, this species of lionfish is popular in large saltwater aquariums because of its brilliant maroon and white stripes and fan-like fins. However, beneath the fin's delicate exterior are venomous spines that are probably used for protection against predators.

Along the southeast United States, adult lionfish have been found at depths of 85 to 300 feet from Florida to North Carolina. Juvenile lionfish have also been observed in North Carolina, Bermuda and as far north as New York. NOAA scientists conclude that the large number of adults observed and the occurrence of juveniles indicates that lionfish are established and reproducing in coastal waters along the southeast United States. Furthermore, there is evidence that lionfish numbers are increasing.

Lionfish were likely first introduced off the Florida coast in the early to mid-1990s by intentional or unintentional release from the aquarium trade, including amateur home aquariums. There is no evidence suggesting that these lionfish derived from other common invasive species sources, such as ballast water dumping from the shipping industry, live-bait use by anglers or fouling on recreational boat hulls or semi-submersible oil platforms. Although it's still too early to predict the impact lionfish will have on the Atlantic coast, the damaging impacts of other invasive species have already left their mark on too many of the nation's valuable coastal ecosystems.