Alpha particles are a type of particle of radiation that is emmited by certain radioactive materials. The materials that give off Alpha particles are called ''Alpha emitters.''
Darker materials tend to absorb solar heat, while lighter materials reflect it.
uranium
plastic
metal
Alpha particles can pass through very few materials. The spacing between nuclei of the material would have to be enormous for an alpha particle to pass through. The passage of alpha particles simply depends on the density of the material.
the sun
Opaque
metal mesh
The surface area can be increased so that it can absorb more materials. The microvilli protrude from the epithelial cells lining.
Alpha radiation (a Helium atom with two neutrons) is very bulky, and therefore cannot penetrate physical objects easily. A sheet of paper will not absorb, but deflect the alpha particle.
No. Clothing and skin will block alpha, but not beta.