- #1

ova5676

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## Homework Statement

What is the maximum order number possible for red light (630 nm) illuminating a double slit with separation 3.0 x 10^5 m.

**Texbook answer:**4.76 x 10^11

## Homework Equations

mλ = d*sinθ

mλ = d*x/L

## The Attempt at a Solution

So λ = 630 nm or 6.30 x 10^-7 m, and d = 3.0 x 10^5 m, but if you use either equation you're missing m or the angle, or x (space between bands) or L (sheet to slit distance).

I'm really confused.