- #1
seifer9
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Homework Statement
Hi everyone,
I was wondering if anyone can help me out with my project in physics. Our goal is to make the sun image appear on a panel at the end of a rail, using lens, to see if we can observe sunspots on the projected image of the sun.
This is the materials we have :
-rail of 120 cm
-a panel of 20x16 cm (so the diameter of the image of the sun would best be around 10cm if possible)
- Lens of different focal distance : +50 mm, +100 mm, +200mm, +250mm, and one -150mm
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Homework Equations
Theres the equation I got but these are from french class so might be different I am not sure.
1/p + 1/q = 1/f
m = -q/p
Sun distance : 1.5 x 10^11 m
Sun diameter 1.392 x 10^9 m
The Attempt at a Solution
From what I understand, the setup should look like this on the rail :
LENS1_____________LENS2_____________________PANEL
I believe I should place a positive focal distance lens first right? like the +250mm, and then the -150mm... but I am having a bit of trouble calculating the distance between the lens and the panel on the rail to get a clear image of the sun at the good diameter. When I calculate that I want a 10cm image of the sun, I get that I need a 10 m LENS and that my image would also be at 10m... its too far for my setup!
Thanks a lot in advance
- Seifer