click below
click below
Normal Size Small Size show me how
Chapter 4 Science
Lesson 1 Telescopes
Term | Definition |
---|---|
electromagnetic radiation | the energy transferred through space by electromagnetic waves |
visible light | electromagnetic radiation that can be seen with the unaided eye |
wavelength | the distance between the crest of one wave and the crest of the next wave |
spectrum | the range of wavelengths of electromagnetic waves |
telescope | a n optical instrument that forms enlarged images of distant objects |
optical telescope | a telescope that uses lenses or mirrors to collect and focus visible light |
refracting telescope | a telescope that uses a curved mirror to collect and focus light |
convex lens | a lens that is thinker in the center than at the edges |
reflecting telescope | a telescope that uses a curved mirror to collect and focus light |
observatory | a building that contains one or more telescopes |
radio telescope | a device used to detect radio waves from objects in space |