Screening

Screening can also mean preventing access of something by some sort of barrier. Particular cases:

• Electric field screening
• Electromagnetic shielding in physics, the exclusion of electric, magnetic, or electromagnetic fields by a metallic screen or shield
• In atomic physics and chemistry, the screening effect or atomic shielding is the reduction of effective nuclear charge by intervening electron shells
• Screening (printing), a process that represents lighter shades as tiny dots, rather than solid areas, of ink by passing ink through a perforated screen
• Screening is a process stage when cleaning paper pulp