Some can be made to, but normal curtains are not designed to block light completely.
Eclipse curtain panels are best for blocking out light.
shimmering curtains of light
Light coming through unfiltered/untinted glass is Direct sunlight. Light coming through shade/screen/curtains, etc, is Indirect.
None
Anything opaque that can block light will block ultraviolet rays. Wearing a shirt will keep your back from getting sunburned by ultraviolet rays.
No, they do not. Blackout curtains are hung on your windows and simply block out light.
to block out the light
Homeowners and renters alike can purchase curtains in dark hues or even blackout curtains. The former, when in use, will dull the offensive light, while the latter will block it out completely. Blackout curtains may have many other benefits.
Curtains evolved from old-school basic window coverings used to simply block out light. So I therefore conclude that curtains have no inventors.
A good set of blinds or curtains can make it easy to save on electric bill expenses. Blinds can help to block light, which may heat the home and require cooling during warmer months. Thicker blinds block more light than thin, inexpensive blinds, making them an ideal upgrade for the home. Some blinds may be recommended as better than others for blocking light or drafts. In addition to blinds, curtains can be used to keep out unwanted light and cold air. Gauzy curtains may be used for a diffused light while heavier curtains can block light and keep out cold air.
Blackout curtains are curtains that block out most light from outside when they are drawn across the windows. You can find them in most furniture or stores that sell home furnishings.
The best material to use for theatre curtains would be a heavy and dark material. Traditionally, velvet was often used because of it's ability to block light that creates shadows behind the curtains.
You'll want to purchase a darker colored curtain made with a think material.
An excellent online company is www.blindsgalore.com. They produce natural woven shades and drapery that can block up to 99% of visible light. J.C.Penney also has a line of room darkening window treatments.
Someone can purchase curtains to block out the sun from a number of retailers both in store and online. They can be bought from eBay, Amazon, Bedroom Blackout and DinoDirect.
Auroras looks like the poles of light curtains. It does not look like light branches of light or planets of light.
If you want to block out all external sound, dark and heavy bespoke curtains are the best. These curtains also offer some other benefits; they keep light and cold draughts from entering your home. I recommend that everyone use Shayamindia.They have varieties of soundproof curtains, whatever your taste are you will find them there.