I got this question out of my text book and it is confusing me, it was shown like this...
2. Which part of the electromagnetic spectrum
(a)allows us to see
(b)is used in ovens (convection)
(c)is used to take images of your teeth (radiation -i think-)
2006-09-12 13:11:09 · 6 answers · asked by Jeanette 2 in Science & Mathematics ➔ Other - Science
The electromagnetic spectrum differentiates between electromagnetic waves based upon there wavelength.
Infrared (for the ovens): 1mm - 700nm
Visible light: 700nm -400nm (nm stands for nanometers= 1x10^-9 meters)
X-ray radiation: less then 10nm
I know it is out of order but I did it on purpose. Infrared energy has the longest wavelength (shortest frequency) and x-ray radiation has the shortest wavelength or highest frequency.
Hope this helps.
2006-09-12 13:19:49 · answer #1 · answered by FilmfibrilProcess 1 · 1⤊ 0⤋
The light portion of the electromagnetic spectrum is (in order, starting with lowest frequency or longest wavelength):
radio waves
microwaves (microwave ovens)
infrared (convection ovens)
red
orange
yellow
green
blue
violet
ultraviolet
x-rays (images of your teeth)
gamma rays
Our eyes are sensitive to red (wavelength 680 nanometers) through violet (410 nanometer), so that is the portion we use to see.
Some birds can see ultraviolet and we can feel infrared on our skin if it is powerful enough, but our eyes cannot see these "colors" because they are outside the visible spectrum.
Your dentist uses x-rays to take images of your teeth because x-rays pass through many solid objects. Microwave ovens use - surprise - microwaves. I've noted that convection ovens use infrared and that is partly true. Infrared radiation helps heat the food in a convection oven, but the food is also heated with direct contact with hot air, which was heated by direct contact with the heating element in the oven. Since hot air rises, this hot air moves upward, cools, and moves downward, creating a circulating air pattern that more efficiently carries heat from the element to your turkey.
You can find a good reference at the link below.
2006-09-12 13:45:51 · answer #2 · answered by ChicagoDude 3 · 1⤊ 0⤋
All gadgets emit electromagnetic radiation (till they're at absolute 0 ?) and the quantity and spectral signature (wavelengths) of that radiation can actual let us know very plenty relating to the character of the item (temperature, composition, etc.). having the flexibility to look over a bigger volume of the EM spectrum ability that we are able to deliver mutually extra records approximately different gadgets. HTH, Doug
2016-12-12 07:26:33 · answer #3 · answered by Anonymous · 0⤊ 0⤋
a. visible 400-700 nm
b. near infrared 700-2000 nm
c. x-rays (tungsten)
2006-09-12 13:29:04 · answer #4 · answered by d/dx+d/dy+d/dz 6 · 1⤊ 0⤋
Hi. a) The visible wavelengths. b) The infrared wavelengths, c) I'll let you guess...
2006-09-12 13:13:30 · answer #5 · answered by Cirric 7 · 2⤊ 0⤋
a is visible light
b is infrared
c is x-ray
2006-09-12 13:12:18 · answer #6 · answered by fomalhaut 2 · 3⤊ 0⤋