Infrared Waves Flashcards
The german-british discoverer of Infrared Radiation
Frederick William Herschel
How was it discovered?
He placed thermometers within each color of the visible spectrum. The results showed an increase in temperature from blue to red. When he noticed an even warmer temperature measurement just beyond the red end of the visible spectrum.
What experiment did William conduct in the 1800s before the discovery of Infrared?
An experiment measuring the difference in temperature between the colors in the visible spectrum.
Infrared Frequency
300 GHz to 400 THz.
Infrared Wavelengths
780 nm to 1 mm
What happens if sunlight is allowed to pass through a glass prism?
The light bends and
Fact
The visible light spectrum is composed of all the rainbow colors. Each color corresponds to a specific wavelength.
Sense of Sight
The ability of the brain to interpret the visible light information as an image.
In what way do remotes use infrared related?
Remote controls use infrared sensors to signal and control devices from distances.
Used by meteorologists and climatologists to study the temperatures around the globe.
Weather Radar
How is Infrared Important in the present and future?
Infrared radiation is important because it contributes to climate change.
Remote control is an example of what type of IR?
Near-Infrared (NIR)
Edme Mariotte
Pioneering experimenter Edme Mariotte showed that glass, though transparent to sunlight, obstructed radiant heat.
Classification of Infrared Radiation (IR)
Short-wavelength, mid-wavelength, near-wavelength, far-infrared, and long-wavelength.
Short Wave IR (SWIR)
This wavelength is not visible to human eyes and as a result can often offer a better image than what is achievable with visible light imaging.
Long-Wave Infrared (LWIR)
This is the radiant heat that uncooled thermal imaging cameras see.
Near-Infrared (NIR)
- Shortest IR Wavelength
- Penetrates the skin’s epidermis layer to remove toxins such as dead skin cells, oils, dirts, and bacteria
- Stimulates collagen and elastin production
- Reduces the appearance of fine lines and wrinkles
- Promotes skin renewal, cell health and tissue growth
Mid-Infrared (MIR)
- Longer Wavelength that can penetrate deeper into the body’s soft tissue where inflammation occurs
- Helps expand blood vessels and increases circulation so more oxygen can reach injured areas of the body
- Stimulates the Cardiovascular System
- Helps your body burn calories and supports healthy weight loss
Far-Infrared (FIR)
- Longest Wavelength in the Infrared Spectrum
- Reaches deep into the body where toxins are stored
- Stimulates sweat glands through direct heat, resulting in deep and detoxifying sweat
- Heats your body from the inside to expel toxins like heavy metals from deep down
Is Infrared harmful or helpful?
IR can be beneficial when used with the right intensity, although it can also be detrimental for certain skin types and when it is too intense.
Infrared sauna
Protects your skin with oral and topical antioxidants.
Additional Fact #1
Infrared light is a natural light spectrum from the sun but does not contain the harmful UV rays associated with unprotected sunlight.
Additional Fact #2
Can pass through dense regions of gas and dust in space with less scattering and absorption.
Additional Fact #3
Infrared energy can also reveal objects in the universe that cannot be seen in visible light using optical telescopes.
What color is the shortest wavelength?
Violet
What color is the longest wavelength?
Red
What are the common uses of Infrared Waves?
Thermal Imaging Cameras - Night vision and security Cameras
Remote Control - Infrared sensors to signal and control devices from distance
Weather Radar - Used by meteorologists and climatologists
