Front

EM waves slow down as they interact with matter.

Back

Effect of matter on EM waves.

Front

Photons (or quanta)

Back

Particles of EM energy.

Front

Radiant energy

Back

Another name for EM energy.

Front

Molecules and atoms vibrate to produce IR radiation.

Back

Production of IR radiation.

Front

Incandescent

Back

An object heated to glowing.

Front

UVA, UVB, and UVC

Back

Three ranges of UV frequencies.

Front

X-ray telescopes are placed in Earth orbit because its atmosphere filters out x-rays.

Back

Need for x-ray telescopes in orbit.

Front

Gamma rays

Back

EM waves with the shortest wavelengths.

Front

Computed axial tomography scans (also known as CAT or CT scans)

Back

Three-dimensional x-ray technology for cancer diagnosis.

Front

Radiotherapy

Back

Ionizing radiation used to treat cancer.