opaque materials
An opaque one.
Even though you can see through a material..i.e. it is transparent...it may have color and a physicist will want to know this information. What type of light is hitting this material is important to include in your question as well as the type of transparent material. What type of light? (and the strength ...source would be great) What type of material? What color is the material? Answer: It allows light to pass through a material
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.
Light is not a material. Material things have mass and light has no mass.
what is the material through which light travels
Some can be made to, but normal curtains are not designed to block light completely.
opaque materials .
A Solar Eclipse
Shadows are formed when an object block the source of light completely or partially
An opaque one.
You could spray it on but it would completely block out any light.
Even though you can see through a material..i.e. it is transparent...it may have color and a physicist will want to know this information. What type of light is hitting this material is important to include in your question as well as the type of transparent material. What type of light? (and the strength ...source would be great) What type of material? What color is the material? Answer: It allows light to pass through a material
Any material that is fully opaque, such as wood, is excellent for blocking light. Lights that are translucent, such as vinyl blinds, will allow more light in.
It's all matter of opinion or personal preference but I suggest drapes over blinds. Blinds let in a little bit of light between the blades while drapes completely block out the light depending on the color of the fabric.
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.
You'll want to purchase a darker colored curtain made with a think material.
Toddlers like to have darkness at night and light during the day. Consider getting some blinds that open completely for the daytime yet close completely to block out light during the nighttime. anonymous@oola.com