I’ve had a talk about “Holography” today. It was a project for my optics class. So I thought It would be a good idea to write a little about this matter.


Holography is a Greek word meaning “whole-drawing”. This method records the light field instead of only recording a reflection of the object. There are different types of holograms like transmission holograms, reflection holograms, rainbow holograms (which we frequently see used for security on credit cards and passports and etc.)

Continue reading “Holography”

The Bell’s spaceships paradox

I wrote this article a couple of months ago, read and wrote everything I understood about this paradox.

This presentation is driven from Jerrold Franklin of Temple university of Philadelphia’s paper “Lorentz contraction,Bell’s spaceships and rigid body motion in special relativity” and Dean and Bern’s paper: “Note on stress effects due to relativistic contraction”.

Bell’s spaceship paradox was formerly designed by Dewan and Beran and became widely known when Bell added a modified version…

This thought experiment was a demonstration of “relativistic contraction can introduce stress effects in a moving body”.


Continue reading “The Bell’s spaceships paradox”