Infrared
Infrared (IR) is invisible radiant energy, electromagnetic radiation with longer wavelengths than those of visible light, extending from the nominal red edge of the visible spectrum at 700 nanometers (frequency 430 THz) to 1 mm (300 GHz) (although people can see infrared up to at least 1050 nm in experiments). Most of the thermal radiation emitted by objects near room temperature is infrared.
Infrared radiation was discovered in 1800 by astronomer Sir William Herschel, who discovered a type of invisible radiation in the spectrum lower in energy than red light, by means of its effect upon a thermometer. Slightly more than half of the total energy from the Sun was eventually found to arrive on Earth in the form of infrared. The balance between absorbed and emitted infrared radiation has a critical effect on Earth's climate.
Infrared energy is emitted or absorbed by molecules when they change their rotational-vibrational movements. Infrared energy excites vibrational modes in a molecule through a change in the dipole moment, making it a useful frequency range for study of these energy states for molecules of the proper symmetry. Infrared spectroscopy examines absorption and transmission of photons in the infrared energy range.
Podcasts:
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Zero 7
-
by Sarai
-
by Sarai
-
by Sarai
-
by Sarai
-
by Sarai
-
by Sarai
-
by Sarai
-
by Zero
-
by Zero
-
by Zero
Dreaming
by: Zero 7I?ve sworn, my love
I?ve been reborn, my love
Don?t be forlorn, my love
I?ve torn my heart
Do not mourn my depart
I?ve been reborn, my love
I'm watching you
There's nothing they can do
Now, I'm reborn, my love
Yeah, you must believe
You?ll live on without me
I?m leaving all my love
I am awake and you are only dreaming
You?ll be okay and you will find some meaning
You will not break, though, you'll buckle with feelings
I am awake and you are only dreaming
Don?t fear my friend 'cause there is no real end
I?ve been reborn, my love
I?m happy here, I have nothing to fear
I?m getting all the love, oh, yeah
So, shed a tear for all the happy years
And just move on, my love
I?ll ride this crowd and when your time comes 'round
We?ll need all our love
I am awake and you are only dreaming
You?ll be okay and you will find some meaning
You will not break, though, you'll buckle with feelings
I am awake and you are only dreaming
I am awake and you are only dreaming
You?ll be okay and you will find some meaning
You will not break, though, you'll buckle with feelings