0
- Ordinary, untreated eyeglasses give some protection.
- Most plastic lenses give more protection than glass lenses, because glass is transparent to UV and the common acrylic plastic used for lenses is less so.
- Some plastic lens materials, such as polycarbonate, inherently block most UV.
- There are protective treatments available for eyeglass lenses that need it, which will give better protection. But even a treatment that completely blocks UV will not protect the eye from light that arrives around the lens.
- Ultraviolet (UV) light is electromagnetic radiation with a wavelength shorter than that of visible light, but longer than X-rays.
Ozone, also known as Trioxygen (or O sub 3) absorbs harmful UV Rays and stops them from reaching the Earth's surface.
Edit: This happens in the Stratosphere.
I think that gold or platinum could be a good reflector for uv (i'm trying some experiences about)
The main materials that UV damages are polymers (e.g. plastic, rubber, protein, nucleic acids, paint).
Add your answer:
Earn +20 pts
What are good reflectors of sound with example?
the moon , frosted glass, aluminium
Are reflectors or absorbers good for keeping cold?
it's reflectors.....
What materials are poor reflectors?
A reflector is a, usually large, sheet of reflective material to reflect light into shadows of an object. Materials such as metals reflect light, whilst materials such as wood and paper do not.
What is catseye?
Catseye's are reflectors that sit in the middle of the road and light up at night.
What type of material always lets light pass through it?
Transparent materials will always allow light to pass through, translucent materials will allow light to pass through as well but the light rays will be scattered. Opaque materials will not allow any light to pass through.
Objects that are good reflectors of light?
Some good reflectors of light include metals like silver, aluminum, and copper, as well as materials with a smooth and shiny surface such as mirrors and glass. These materials are able to reflect light due to their high reflectivity and smooth surfaces.
What are good reflectors of sound with example?
the moon , frosted glass, aluminium
What materials are poor reflectors of light?
Materials such as wood, paper, fabric, and rough surfaces like concrete are poor reflectors of light. These materials absorb more light than they reflect, resulting in low reflection and poor overall reflectivity.
What materials are bad reflectors of light?
Materials that are dark or absorbent, such as black cloth, wood, or matte surfaces, are bad reflectors of light because they absorb the light instead of reflecting it. Rough or uneven surfaces also tend to scatter light rather than reflect it effectively.
Do cat's eyes give out light?
No but they are very good reflectors.
What kind of materials appear to be worst reflector?
Materials that are dark and absorb light rather than reflecting it tend to be poor reflectors. Rough, matte surfaces also tend to reflect light in many directions rather than clearly reflecting it back, making them less effective as reflectors. Materials that are transparent or translucent also tend to be poor reflectors because light tends to pass through them rather than being reflected.
What materials are known to be good heat reflectors or insulators?
Materials such as aluminum foil, silver, and reflective paint are good heat reflectors. Insulating materials like fiberglass, foam board, and cellulose are effective at reducing heat transfer and insulating against temperature changes.
Is diamond are reflectors?
Diamonds are not typically used as reflectors because they have a high refractive index, which causes light to be refracted rather than reflected. Materials with lower refractive indices, such as metals or mirrors, are more commonly used as reflectors.
What materials are bad reflectors?
Materials that are bad reflectors include black surfaces, rough surfaces, and materials with high absorbance properties, such as coal or felt. These materials do not bounce back light efficiently and absorb a significant amount of it instead.
Are black or dull surfaces good reflectors?
No, black or dull surfaces are not good reflectors because they absorb light rather than reflecting it. Reflectivity is higher in surfaces that are smooth and shiny, such as mirrors or metals.
Are all light reflectors opaque?
No, not all light reflectors are opaque. Some reflectors, such as mirrors and polished metal surfaces, can be transparent or translucent while still effectively reflecting light. The ability of the material to reflect light is more important than its opacity.
What materials reflect the most heat?
Materials with high thermal conductivity such as metals like aluminum and copper are good reflectors of heat. Reflective materials like silver and polished stainless steel also reflect heat effectively. These materials are often used in items like cookware, reflectors, and building insulation to manage heat.
