Diseases, Conditions, Syndromes

Warmer temperatures slow COVID-19 transmission, but not by much

It is well known that rates of transmission of some respiratory viruses, including influenza, tend to fall during the summer months. As COVID-19 has spread across the globe, questions have been raised about whether warming ...

Diseases, Conditions, Syndromes

Coronavirus: the importance of ventilation

Using laser light techniques, UvA physicists and medical researchers have found that small cough droplets, potentially containing virus particles, can float in the air in a room for many minutes, especially when the room ...

Diseases, Conditions, Syndromes

Ultraviolet light has bright future in fight against COVID-19

A particular type of ultraviolet light known as far-UVC could be safely used for air disinfection in public places without harming people, according to new research carried out jointly at the University of St Andrews and ...

Psychology & Psychiatry

A new method to treat insomnia

Insomnia disorder is the second-most common mental health problem and a major risk factor for depression. Cognitive behavioral therapy for insomnia (CBTi) is the treatment of choice and has successfully been provided through ...

Oncology & Cancer

The importance of a skin cancer check

Q: I turn 50 this year and at my annual physical, my doctor suggested I visit a dermatologist to check for melanoma. I have never had any suspicious moles or spots on my skin, so I've not had a skin check with a dermatologist ...

Diseases, Conditions, Syndromes

Battling disease with ultraviolet light

Now and in the months to come, hospitals and commercial buildings will be tasked with sanitizing large indoor environments to prevent the transmission of viruses like SARS-CoV-2, which causes COVID-19. A new seed grant-funded ...

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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.

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