What are the errors in Young's Double Slit experiment?

[MPZ]

Homework Statement

I am having troubles trying to figure out systematic and random errors when conducting Young's double slit experiment.

Homework Equations

NA

The Attempt at a Solution

I have found one error which could be correct, it is the fact that the laser was not at right angles with the slits, this created a variance in the distance between the negative and positive orders of max intensity

 

[MPZ]

bump

 

[TJGilb]

Think about what parts of the experiment are dependent on measurement. Generally speaking, each time you take a measurement, there is room for error if for no other reason than the tolerance of the measuring equipment.