# Ray Diagram

1. Homework Statement
This is a follow on question. The first few questions ask about finding the numerical answer. The question that I am confused about and cannot do seem to do properly says:
Complete the ray diagram to locate the position of the image shown on the retina when effective focal length of eye is $0.020m$.

2. Homework Equations
I was given the total power of the lens+cornea as $56.0D$. I calculated the focal length by $f = \frac{1}{P} = \frac{1}{56} = 0.02m$ to 2dp.

3. The Attempt at a Solution
I attempted it and drew the focal points $0.02m$ from the center axis which is the lens+cornea axis. They had already provided an arrow for the Image on the retina but when I drew the diagram, it didn't meet on the grid but met outside the grid that they had provided.

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could you indicate roughly what is the ordering of these and their separation?
retina, lens, focal point, image, object

Basically, the grid scale was 1 small square= 0.002m. The grid had 5x5 small boxes which made up one cm square.

There is only a grid with an axis and we have to draw all the points ourself so I thought that I would need to draw the focal point 2 cm away from the y-axis.

There isn't any detail about the separation. I assume you just have to draw it approximately, showing how a real image is formed?