Does a Galilean telescope produce a real image?
The Galilean telescope (fig. 1) consists of a converging lens (plano-convex or biconvex) serving as objective, and a diverging lens (plano-concave or biconcave) serving as eyepiece. The objective forms a real image, diminished in size and upside-down, of the object observed.
What could Galileo’s telescope see?
Galileo was the first to point a telescope skyward. He was able to make out mountains and craters on the moon, as well as a ribbon of diffuse light arching across the sky — the Milky Way. He also discovered the rings of Saturn, sunspots and four of Jupiter’s moons.
What was Galileo’s telescope made of?
Original telescope made by Galileo consisting of a main tube and two smaller housings in which the objective and the eyepiece are mounted. The main tube consists of two semicircular tubes held together with copper wire. It is covered with paper.
Where is Galileo telescope now?
Museo Galileo
Today, over 400 years later, Galileo’s Telescope still survives under the constant care of the Istituto e Museo di Storia della Scienza (renamed the Museo Galileo in 2010) in Italy. The Museum holds exhibitions on Galileo’s telescope and the observations he made with it.
What are the limitations of a Galilean telescope?
Notice that this lens is actually different than the plano convex lens used in the original Galilean telescope, but still gives the same results. The following design uses pieces of the inner tube of the mailing tube to hold the lenses in place inside the outer tube.
How many lenses did Galileo’s telescope have?
two lenses
A Galilean telescope consists of two lenses: a large converging lens of long focal length (the objective) and the eyepiece – a diverging lens of a short focal length. Interestingly, both of these lenses on their own produce a smaller image of a distant object, but when combined the produce a magnified image.
What size was Galileo’s telescope?
Galileo’s original telescope had a 37mm diameter plano-convex objective lens with a focal length of 980mm. The original eyepiece was lost, but according to Galileo’s writings was plano-concave with a diameter of about 22mm and a focal length of about 50 mm.
How long was Galileo’s telescope?
Galileo’s famous telescope for observing Jupiter’s moons had a convex lens with a focal length of about 30-40 inches and a concave ocular lens of about 2 inches, contained in a little tube that could be adjusted for focusing.
Why is Galileo Galilei famous?
He was the first to see craters on the moon, he discovered sunspots, and he tracked the phases of Venus. Of all of his telescope discoveries, he is perhaps most known for his discovery of the four most massive moons of Jupiter, now known as the Galilean moons: Io, Ganymede, Europa and Callisto.
How accurate was Galileo’s telescope?
Galileo’s work shows that he was capable of achieving an accuracy of 2” or better in measuring and drawing the positions and sizes of celestial objects.