Measure the width/thickness of the given samples by analyzing the diffraction pattern.

• Adjustable laser allows easy alignment of the laser source with the sample
• A laser range finder allows for use of any wall as a screen, increasing the distance between the screen and the sample
• Multiple samples can be tested and verified using modular setup

The characteristics of light such as interference and diffraction can be understood when light is studied as a wave phenomenon. Interaction of waves with matter results in either transmission, reflection, absorption, or diffraction of the wave. When the size of the matter is comparable to the wavelength of the wave that it interacts with, a phenomenon called diffraction occurs.

Diffraction of light due to particles is a function of the size of the particle and the wavelength of the light incident. It is possible to measure the size of a particle by studying the diffraction patterns created by it.