# Is this the right formula to use?

1. Mar 15, 2007

### linuxux

1. The problem statement, all variables and given/known data
Not sure which equation to use?

600nm light falls on a single slit of width 0.015mm. What is the angular width of the central maximum?

2. Relevant equations

$$\Delta\theta = 2\left(\frac{\lambda}{slit width}\right)$$

is that the right equation to use?

Last edited: Mar 15, 2007
2. Mar 15, 2007

### Staff: Mentor

Looks good to me. But to gain confidence, you should understand how it is derived.