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?
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 dont know what im doing wrong