- #1
RedLego
- 5
- 0
Homework Statement
A biology student wishes to examine a bug at a magnificaiton of +5.00 by looking through a single lens. the student wants the image of the bug to be a distance of 25cm from the lens. what is the focal length of the lens?
Answer:+6.25cm
Homework Equations
m=-d(image)/d(object)
1/f=[itex]\frac{1}{d(object)}[/itex]+[itex]\frac{1}{d(image)}[/itex]
The Attempt at a Solution
first i solve for distance of object, d(object), by using the first equation:
d(object) = (25x10-2)/5
then i calculated focal length by using the second equation
f = ((1/0.5) + (1/0.25))-1 = 0.041667
i don't know what I am doing wrong