questions related to telescope.....

[albertlee]

1)

Is it true that concave mirror with shorter radius to the curvature transmits objective in shorter focal length?

because I dont agree to this....

 

 

2)

Who discovered that the image we see on telescope is actually an event occured long time ago, since light has to travel with a fixed speed? and how did he make this conclusion with proof?

 

 

3)

larger primary mirror in a reflecting telescope give further sight to the deeper space, but how does that mean that artronomer can see more "recently" event in the universe? like from 2), the light's speed is fixed...

 

 

any help on my questions?

 

 

thanks