Refracting
Refract means:
to bend
Pure reflecting telescopes use ___________ instead of lenses.
mirrors
Find the magnification of a 100 cm focal length objective lens with a 2 mm eyepiece.
50x
Refracting telescopes suffer badly from ______ ________, which is a color distortion.
chromatic aberration
Why would a reflecting telescope be more advantageous than a refracting telescope for observing very faint, distant galaxies?
Reflecting telescopes can be made much larger, gathering more light
You use a magnifying glass with a focal length of 20 cm. What is the magnification?
1.25x
Why do space telescopes like Hubble produce clearer images than even the largest ground-based telescopes?
They avoid atmospheric turbulence and distortion
A student observes that their refracting telescope shows Saturn upside-down, but their friend's reflecting telescope shows it as a mirror image. What explains this difference?
Different optical designs create different image orientations
Reflecting telescopes produce am image that is _____________ than a refracting telescope. (brighter/darker)
Darker
A telescope has a focal length of 1500mm and you want 75× magnification. What eyepiece focal length do you need?
20 mm
Why is aperture (diameter) more important than magnification when choosing a telescope for deep-space observation?
Larger aperture provides better light-gathering power and resolution
Why might an astronomer choose to use a radio telescope instead of an optical telescope to study a particular celestial object?
The object might be hidden by dust clouds that block visible light
The reason our refracting telescope had a mirrored image instead of a flipped image is
the diagonal flipped it back.
Telescopes that are a mix of reflecting and refracting are called __________ ___________.
compound telescopes
How much more light would a 15-inch diameter telescope collect compared to a 5-inch diameter telescope?
9 times more
How did Galileo's telescope observations challenge the scientific understanding of his time?
He discovered that celestial objects had detailed features and were not just dots of light