No material. Computers don't radiate.
Lead is a material that effectively blocks radiation.
When light encounters an opaque material adjacent to a transparent material, most of the light is reflected and absorbed by the opaque material, while a small amount may be transmitted through the transparent material. The opaque material blocks the passage of light, creating a shadow on the transparent material.
Lead and concrete are effective materials for blocking nuclear radiation.
Lead. Even a thin layer of lead blocks most radiation, where bone is fairly transparent at many frequencies.
A radiation drop is a decrease in radiation levels, typically due to a decrease in the radioactive material emitting the radiation or due to shielding that blocks the radiation from reaching a certain area. It indicates a lessening of radiation exposure in the environment.
Lead is the most effective material for blocking gamma radiation and preventing its penetration through materials.
No. Transparent means you can see through it. Glass blocks are translucent which means they let some light through but distort it so that you can not see through it.
A translucent material transmits some light while diffusing it, allowing some light to pass through but scattering it in different directions. This results in partial visibility through the material, as it both transmits and blocks some light.
A transparent substance allows light to pass through it freely, resulting in visibility through the material. In contrast, an opaque substance blocks light from passing through, making it impossible to see through the material.
Certain materials, like glass and certain plastics, can block infrared cameras from detecting heat signatures because they are transparent to infrared radiation.
Metal is the material that blocks radio waves and prevents their transmission.
Opaque materials such as metals, certain plastics, and thick glass blocks infrared radiation and prevents it from passing through.