Find λ of light using a laser beam and a diffraction grating

[ephphatha16]

1. What is the advantage of using class 2 laser light?
I would really appreciate if reference source is also given!

Homework Equations

Not needed.[/B]

The Attempt at a Solution

Well, I thought that using monochromatic light would made it easier to measure the distance between fringes. And also, using laser means, that the light fringes formed are bright as laser has high intensity.
Thanks a lot for the phyzzing support! (Ah well, a poor attempt to superimpose physics and fizzing)

 

[scottdave]

What can you say about the wavelength of monochromatic light (vs "regular" light)? How would this help in the experiment?

 

[ephphatha16]

What can you say about the wavelength of monochromatic light (vs "regular" light)? How would this help in the experiment?

Monochromatic light has single wavelength while in white light, there's mixture of wavelengths from 400nm-630nm. So I suppose this will help me to measure the distance between the fringes more accurately as the fringes only correspond to one specific wavelength?

Also I have another doubt related with the experiment. To calculate the width of maximas between 1st order and 0th order ruler was used. Why? Is it because it has lesser uncertainty?