Image distance for star reflection in concave mirror with 1.70 m radius

[rhxoehwhfh]

The light from a star reflects from a concave mirror with a radius of curvature of 1.70 m. Determine how far the image of the star is from the surface of the mirror.

I also don't know how to do this one either

 

[kudoushinichi88]

-_-" Since the star is really really far away, set the distance of the object from the mirror to be at infinity. Then, draw the diagram. The last time I did these sort of diagrams is when I was 17, so I can't really help you much with the diagram...

 

[rhxoehwhfh]

so how exactly do I have to do this T.T...

 

[rl.bhat]

Light from the star can be taken as a paralllel beam of light. When a parallel beam of light falls on a concave mirror or a convex lens they are brought to focus at the focal length. In the cas of concave mirror focal length = half the radius of curvature.