Register to reply

Absorption line spectrum

by ElmorshedyDr
Tags: absorption, line, spectrum
Share this thread:
klimatos
#19
Jul6-14, 02:16 PM
P: 409
Quote Quote by voko View Post
but the surface of the Sun radiates mostly in the visible part of the spectrum.
Depending upon where you place the dividing lines, solar radiation at the outside of the Earth's atmosphere is roughly 46% infrared, 9% ultraviolet, and only 45% visible.
voko
#20
Jul7-14, 12:39 AM
Thanks
P: 5,687
Quote Quote by klimatos View Post
Depending upon where you place the dividing lines, solar radiation at the outside of the Earth's atmosphere is roughly 46% infrared, 9% ultraviolet, and only 45% visible.
Thanks for the correction. I really meant to say that the maximum intensity is in the visible part.
sophiecentaur
#21
Jul7-14, 04:49 AM
Sci Advisor
PF Gold
sophiecentaur's Avatar
P: 11,958
To get a realistic idea of the relevance of the power levels, it's necessary to state the bandwidth involved. It's normal to quote such things in terms of power per unit bandwidth or, sometimes, power per octave. The visible region only consists of just an octave of frequencies.
For many practical reasons, our vision works in a particular frequency range (partly because there's a lot of energy around in that region and partly because of the physics of actually detecting images - etc.)


Register to reply

Related Discussions
Absorption and Emission Spectrum General Physics 10
Infrared absorption spectrum of CO2 at 4,3 Ám Atomic, Solid State, Comp. Physics 2
Continuous absorption spectrum - why this happens? Introductory Physics Homework 4
Continuous absorption spectrum Introductory Physics Homework 2
Absorption spectrum General Physics 4