topic 2 unit 5 Flashcards
what is a telescope
is used to magnify objects at great distances.
what does a simple telescope magnify objects with
an ocular lens and objective lenses
what did the mathematics of the eclipse discover?
the speed is never the same anywhere in the eclipse
what is the ocular lens
is the large one at the front of the telescope
what is the eypiece
is though which you can view the magnified objects
what were Galilieos observations and theories on space?
he observed that Jupiter is accompanied by four small stats that move back and forth across it. He concluded that Jupiter is orbited by four moons.
What did Galileo’s observations support
Copernicus’s sun-centred model but not ptolemy’s Earth-centred model
What is one example of the moons that Galileo observed
Jupiter
what does the earth centred model assume?
that all celestial bodies orbit earth, Jupiter’s moons orbit Jupiter and not earth, this led to the decisions
how do you build a powerful telescope?
you need to increase its resolving power
what is resolving power
the kind of power is the fineness of detail the telescope can produce of the objective lens
A telescope with a hammer diameter objective lens can what?
magnify as much as you want
what is a refracting telescope
has a lens for there objective
what is a reflecting telescope
telescopes that has mirrors as objectives
who was ptolemy?
he corrected Aristotle’s earth centred model so that the planets were attached to small spheres called “Epicycles” which were attached to the main sphere
who was Copernicus?
he proposed the sun-centred model in which the sun was in the centre, and the earth, moon, and planets resolved around it
who was lippershey
he invented the telescope in 1608
who was Galileo
agreed with Copernicus’ sun centred model and improved the telescope and observed different planets along with the moon and the sun
who is newton
he designed the reflecting telescope to solve the problem with the refracting telescope. He also introduced the concept of universal gravitation and stated that “all objects attract other objects”
who was Kepler
he fixed the problem with the sun-centred model. He concluded that the planets orbits are elliptical rather than circular
what do you use to measure a altitude
astrolabe
how do you measure azimuth
compass
what is newtons law
stated that there is a gravitational force between all objects that pulls them together. With no force acted on the object it will move in a straight line at a constant speed.
