# Homemade Compound Microscope Problem

• molip790
In summary, the conversation discusses the use of a homemade compound microscope with thin lenses of focal lengths 1cm and 3cm for the objective and eyepiece, respectively. The magnifying power of the microscope is calculated using the equation M = (-25)(L)/(fo)(fe), resulting in a value of 41.6x. The separation of the lenses is also determined using the equation 1/s + 1/s' = 1/fo and feff = 1/fo + 1/fe - d/fofe, with a final value of 2.39, which is incorrect, as the correct value is 8.681. The conversation also mentions a homemade simple focuser with focal lengths
molip790
1. Homework Statement

A Homemade compound microscope has, as objective and eyepiece, thin lenses of focal lengths 1cm and 3cm, respectively. An object is situated at a distance of 1.20cm from the objective. If the virtual image produced by the eyepiece is 25cm from the eye, compute (a.) the magnifying power of the microscope and (b) the separation of the lenses

2. Homework Equations

M = (-25)(L)/(fo)(fe) where L is the length, and fo = focal length of objective, and fe = focal length of the eyepiece

1/s + 1/s' = 1/fo

M = 25/feff where feff is the effective focal length of the two lenses separated by a distance d

So... 1/feff = 1/fo + 1/fe - d/fofe

3. The Attempt at a Solution

(a.) 1/s + 1/s' = 1/fo
1/1.20 + 1/s' = 1/3
1/s' = -1/2
s' = -2cm

then...
M = -25L/fofe
= -25(s'-fo)/fofe
= -25(-2-3)/(3*1)
= 125/3
M = 41.6667 ? which isn't right (its supposed to be 46.7x)

which will make part b. wrong, but even with the correct answer using the equation I have:

M = 25/feff and feff = 1/fo + 1/fe - d/fofe I still get d = 2.39 which is also incorrect, its supposed to be 8.68

molip790 said:
1. Homework Statement

A Homemade compound microscope has, as objective and eyepiece, thin lenses of focal len...
Dear molip790
I could not translate well but I understand that you have problems on homemade microscop.
The picture below shows how to do:

=>

The equations below you can calculate that binds to a microscope.

Another home made compound microscopes.

***
***

Homemade simple focuser =>

f1 =10 mm ; f2 = 30 mm ; s = 12mm

s' = 60 mm => M f1 = s' / s = 60 / 12 = 5 x.

M mic. = Mf1 . (250 / f2) = 41.6 X

Last edited:

## 1. What is a homemade compound microscope?

A homemade compound microscope is a type of microscope that is made from materials that are easily accessible and can be constructed by an individual rather than purchased from a manufacturer. It is typically used for basic scientific experiments and observations.

## 2. What are the components of a homemade compound microscope?

The main components of a homemade compound microscope include a light source, lenses (such as an objective lens and an eyepiece), a stage to hold the specimen, and a focusing mechanism. Some homemade microscopes may also include a mirror for reflecting light and a sample holder for holding the specimen in place.

## 3. What are the advantages of using a homemade compound microscope?

One of the main advantages of using a homemade compound microscope is the cost savings compared to purchasing a commercially-made microscope. It also allows for customization and experimentation with different materials and designs. Additionally, building your own microscope can be a fun and educational project.

## 4. What are the limitations of a homemade compound microscope?

Homemade compound microscopes may have lower magnification and resolution capabilities compared to commercially-made microscopes. They may also be less durable and may require more frequent adjustments and maintenance.

## 5. Can a homemade compound microscope be used for professional research?

While a homemade compound microscope may be suitable for basic scientific observations and experiments, it may not be suitable for professional research. Commercially-made microscopes are typically more reliable and have higher magnification and resolution capabilities, making them better suited for advanced research.

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