What materials block, reflect, absorb or emit infrared light?
Infrared Light (IR) – is and electromagnetical radiation this is not visible to a Human eye but visible to a CCTV Camera. Infrared radiation has wavelenght of beyond 700nm. There are several materials that absorbs, reflects and emit infrared radiation. They are as follows:
Material that absorb infrared radiations:
Infrared Light (IR) – is and electromagnetic radiation this is not visible to a Human eye but visible to a CCTV Camera. Infrared radiation has wavelengths of beyond 700nm. There are several materials that absorb, reflects and emit infrared radiation. They are as follows:
Material that absorb infrared radiations:
1) Surface of earth.
2) Wood, Brick, Stone, ashplat and stone.
3) Gold, Magnese and copper.
Material that reflects infrared radiations:
1) Skin.
2) Snow.
3) Sheets of aluminium.
Material that radiates IR:
1) Dark Color substances.
2) Incandescent light bulbs.
1) Surface of earth.
2) Wood, Brick, Stone, ashplat and stone.
3) Gold, manganese and copper.
Material that reflects infrared radiations:
1) Skin.
2) Snow.
3) Sheets of aluminium.
Material that radiates IR:
1) Dark Color substances.
2) Incandescent light bulbs.
Thermal infrared, which corresponds to wavelengths longer than about 5 microns is a direct measure of temperature. One simple material that blocks IR is plexiglass. We use it in a demonstration of infrared radiation and the greenhouse effect. Also, water is a good absorber of IR. Hence, one must get above the atmosphere’s water vapor to conduct most infrared astronomy measurements. Any good mirror should also be capable of reflecting infrared light. Most ground-based telescopes that observe in the “near-infrared” (betweewn 1 and 2.5 microns) rely on the same telescopes as for optical astronomy. Finally, thermal IR is a measure of heat, and *any* object above absolute zero (-273 C) emits infrared radiation. The hotter a source, the more IR light it emits.
