- #1
CaptainMarvel
- 13
- 0
Hi there,
Could somebody explain how illumination - by which I mean flux per unit area - depends on the mirror diameter of a telescope and/or its focal length?
Is this different for point objects like stars and for extended objects like nebulae?
Thanks in advance,
Nick :-)
Could somebody explain how illumination - by which I mean flux per unit area - depends on the mirror diameter of a telescope and/or its focal length?
Is this different for point objects like stars and for extended objects like nebulae?
Thanks in advance,
Nick :-)