Chapter 16 Study Guide Flashcards
energy that can travel through space in the form of waves
electromagnetic radiation
all colors that you can see
visible light
the distance between the crest of one wave and the crest of the next wave
wavelength
a range of different colors with different wave lengths
spectrum
a telescope that used lenses or mirrors to collect and focus visible light
optical telescope
a telescope that used convex lenses to gather and focus light
refracting telescope
a piece of transparent glass, curved so that the middle is thicker than the edges
convex lens
a telescope that uses a curved mirror to collect and focus light
reflecting telescope
devices to detect radio waves from objects in space
radio telescope
a building that contains one or more telescopes
observatory
imaginary patterns of stars
constellation
a device that breaks light into colors and produces an image of the resulting spectrum
spectograph
a star’s brightness as seen from Earth
apparent brightness
the brightness a star would have if it were at a standard distance from Earth
absolute brightness
the distance that light travels in one year
light-year
the apparent change in position of an object when you look at it from different places
parallax
a diagram used to classify stars and to understand how they change over time
Hertzsprung-Russel (HR) diagram
