Visible Light: Beyond 400-800nm?

[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?

 

[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.

 

[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.