# Measuring the size of a molecule

ecy5maa
Hi,

## Homework Statement

I am trying to determine the size of a molecule..by doing the oil drop experiment where we drop a tiny droplet of oil on water covered with a thin layer of powder...and then make calculations based on the diameter of the circle... the droplet forms in oil.

## The Attempt at a Solution

However, the oil droplet for me is not making a circle..rather is spreading out irregularly. How can I fix this.

Everything i have used is according to this site:
Code:
[PLAIN]http://www.practicalphysics.org/go/Experiment_633.html[/PLAIN] [Broken]
but i have used talcum powder instead of lycopodeum powder

Last edited by a moderator: