Expressing the full width at half maximum Δω by τ

[K09]

Homework Statement

I need to express the full width at half maximum Δω as an expression in terms of τ.

Homework Equations

I'm guessing that the expression of Δω will fulfill this task.

The Attempt at a Solution

The problem is I have no idea how to go about the calculations :|

 

[K09]

How do I delete this post?!