Exploring Telescopes

Front

Telescope

Back

Instrument to observe distant objects

Front

Optical Telescope

Back

Uses lenses or mirrors to gather light

Front

Refracting Telescope

Back

Uses lenses to bend light

Front

Reflecting Telescope

Back

Uses mirrors to reflect light

Front

Aperture

Back

Diameter of telescope's main lens or mirror

Front

Focal Length

Back

Distance from lens/mirror to focus point

Front

Magnification

Back

Ratio of image size to object size

Front

Electromagnetic Spectrum

Back

Range of all types of electromagnetic radiation

Front

Light Pollution

Back

Interference from artificial lights

Front

Adaptive Optics

Back

Technology to improve image quality by reducing distortions