Which type of radiation can be stopped with just a piece of paper?

Which type of radiation can be stopped with just a piece of paper?

• A. Beta radiation
• B. Gamma radiation
• C. Alpha radiation
• D. X-ray radiation

Answer: (C)

Alpha radiation can be stopped by a piece of paper because it consists of relatively large particles made up of two protons and two neutrons, which is essentially the nucleus of a helium atom. Due to their mass and charge, alpha particles have a very low penetration power. They can be easily absorbed by even a few centimeters of air or a thin barrier such as paper. In contrast, beta radiation, which consists of fast-moving electrons, can penetrate further and requires a denser material for shielding. Gamma radiation and X-ray radiation, both forms of electromagnetic radiation, have even greater penetration abilities and cannot be effectively shielded by something as thin as paper; they typically require dense materials like lead or several centimeters of concrete for adequate protection. Understanding the characteristics of these radiation types is essential for effective radiation safety practices.

Alpha radiation can be stopped by a piece of paper because it consists of relatively large particles made up of two protons and two neutrons, which is essentially the nucleus of a helium atom. Due to their mass and charge, alpha particles have a very low penetration power. They can be easily absorbed by even a few centimeters of air or a thin barrier such as paper.

In contrast, beta radiation, which consists of fast-moving electrons, can penetrate further and requires a denser material for shielding. Gamma radiation and X-ray radiation, both forms of electromagnetic radiation, have even greater penetration abilities and cannot be effectively shielded by something as thin as paper; they typically require dense materials like lead or several centimeters of concrete for adequate protection. Understanding the characteristics of these radiation types is essential for effective radiation safety practices.