# Visible domain

1. Apr 10, 2010

### Petar Mali

In spectrum of EM radiation domain of visible light isn't strictly limited. In books is usually given from $$400-800nm$$. But for visible domain short-wave limit is $$\lambda=430nm$$, and long-wave limit is $$\lambda=690nm$$? Why we say then that the boundaries are $$400-800nm$$?

2. Apr 10, 2010

### Rajini

Yes it differs from book to book...the boundaries are not very strict..i say the visible range is from 350 nm to 750 nm.

3. Apr 10, 2010

### mathman

If you google "wavelength of light" you will get a slew of results and they will all be slightly different. Lower limit 350 - 400, upper limit 690 - 750.