Psychology & Psychiatry

Combining science and design to measure our exposure to light

Daylight plays an essential role in sleep, alertness and hormone regulation. EPFL has joined forces with Geneva School of Art and Design (HEAD—Genève) to develop a wearable sensor that measures how much light an individual ...

Radiology & Imaging

Combination of microscopy techniques makes images twice as sharp

Researchers at Delft University of Technology have combined two existing super-resolution microscopy techniques to create a new method. Many experts thought that combining these techniques was not technically possible. The ...

Oncology & Cancer

Microcapsules for targeted drug delivery to cancer cells

A team of scientists from Peter the Great St.Petersburg Polytechnic University (SPbPU) together with their colleagues developed a method of targeted drug delivery to cancer cells. The discovery is based on the use of mesenchymal ...

Neuroscience

Three types of cells help the brain tell day from night

Bright light at night interrupts the body's normal day-night cycles, called circadian rhythms, and can trigger insomnia. In fact, circadian rhythms play a major role in health. Disrupted day-night cycles have even been linked ...

Health

Innovative approach to lighting set to improve sleep quality

New Australian research by the Cooperative Research Centre for Alertness, Safety and Productivity (Alertness CRC) reveals blue light may be even more important than previously thought. The work points to the amount of blue ...

Diseases, Conditions, Syndromes

Q&A: Treating melasma

Dear Mayo Clinic: Years ago, I had some patches of melasma on my face removed with IPL treatment. When I went to make an appointment with my dermatologist recently for the same condition, I was told IPL should not be used ...

Health

Photoinitiators detected in human breast milk

Photoinitators (PIs) are compounds used in the ink of many types of food packaging. The substances have been shown to migrate into food and, when consumed, show up in human blood serum. Now, for the first time, researchers ...

Diseases, Conditions, Syndromes

WHO prequalifies first Ebola vaccine

The World Health Organization (WHO) on Tuesday said it had prequalified an Ebola vaccine for the first time, hailing a "critical step" towards its licensing, access and roll-out in countries most at risk of outbreaks.

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Light

Light is electromagnetic radiation, particularly radiation of a wavelength that is visible to the human eye (about 400–700 nm, or perhaps 380–750 nm.) In physics, the term light sometimes refers to electromagnetic radiation of any wavelength, whether visible or not.

Three primary properties of light are:

Light, which exists in tiny "packets" called photons, exhibits properties of both waves and particles. This property is referred to as the wave–particle duality. The study of light, known as optics, is an important research area in modern physics.

This text uses material from Wikipedia, licensed under CC BY-SA