Telescopes Flashcards
1
Q
describe a early telescope
A
converging lens at the front (objective lens)
and diverging lens to look through
2
Q
do lenses have different focal points for different colours of light. true or false
A
true
3
Q
what can happen if you use a concave mirror?
A
a clear image can be formed
4
Q
describe a modern refracting telescope
A
the object of lens and the eye piece are converging
5
Q
what does the object lens produce?
A
a image of a distant object at its focal point
6
Q
what does a eye piece do
A
magnify the image
7
Q
describe a reflecting telescope
A
is much larger and easier to manoeuvre than refracting telescopes
8
Q
what is a advantage of reflecting telescopes
A
much smaller mass than a bulky lens
