Libra_girl
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Homework Statement
A diverging lens of 6 mm focal length produces an image of magnification m = 1/2. What
is the distance between the object and the lens?
Distance between the object and the lens
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A diverging lens of 6 mm focal length produces an image of magnification m = 1/2. What
is the distance between the object and the lens?
Discussion
Libra_girl
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tiny-tim said:Hi Libra_girl ! Welcome to PF!
Hint: what equations do you know that relate the size of the object to the size of the image?
Is it the equation: do/di = m or 1/do + 1/di = 1/f ?
Libra_girl
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tiny-tim said:Both equations!
Except isn't it m = -di/do?
yeah it is sorry
Last edited:
Libra_girl
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Libra_girl said:yeah it is sorry
tiny-tim said:Both equations!
Except isn't it m = -di/do?
Ok so I know f and I know m, now I am solving for do, but I don't know the di?
Science Advisor
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Hi Libra girl,
You now have two equations in two unknowns. You can solve the magnification formula for one of the variables and plug it into the other formula. What does that give?
You now have two equations in two unknowns. You can solve the magnification formula for one of the variables and plug it into the other formula. What does that give?