Topic 3&4 Flashcards
Optical telescope do what so we can see
Gather and focus light
Refracting telescopes use what so we can see
uses two lens to gather and focus starlight
Reflecting telescopes use what so we can see
mirrors
spin casting uses what to make mirrors
molten glass poured into a spinning mold
what is interferometer
combining 2 or more telescopes
what is wavelength
The distance traveled by the wave during one complete oscillation
what is frequency
number of waves passing by a specific point
what is a space probe?
space probes are unmanned satellites or remote controlled landers
What is triangulation ?
triangulation is the geometry of a triangle by measuring the angels between the baseline and the target object
What is parallax ?
it is the apparent shift in position of nearby objects
What do astronomers use a stars parallax for?
to triangulate the stars distance from earth
when light from a star is passed through a prism it creates?
a rainbow like pattern
What can you use a stars spectras for?
To determine their movement relative to earth.
