Stars like the sun are considered near-perfect blackbodies. They absorb almost all wavelengths of electromagnetic radiation without reflection. The light we see emitted from the sun is a result of ...

Radiotherapy to the head and neck causes temporary (or acute) side effects. Side effects can be mild or more severe, depending on the size of the area being treated and the length of your treatment.

Ultraviolet (UV) radiation is a type of light. Sunlight has UV rays, along with other kinds of rays. Some light bulbs give off UV rays, too. UV light bulbs are used in tanning beds and lamps, some ...

A CT scan exposes your body to some radiation. That involves a small amount of risk, and it’s important to understand the issues. A CT scan uses what’s called “ionizing” radiation.

When you have cancer, though, some cells start to divide way too fast. That's where radiation therapy can help. It uses high-energy particles to make tiny breaks in the DNA of cancer cells to ...

Scientists blasted the 4,600-year-old structure with electromagnetic waves, a form of radiation that travel though the universe, finding it focused and amplified the energy into specific ...