Explain the principle of image formation in a pinhole camera and determine the height of the tower using the camera measurements.

Item 2.

The community members are worried and wonder why such a small quantity of radioactive material requires strict precautions.

Radioactive materials emit ionizing radiation (such as alpha, beta, and gamma rays). This radiation carries enough energy to remove electrons from atoms, which can damage living cells, DNA, and tissues. Even a small quantity of a highly radioactive substance can emit a significant amount of radiation, posing a serious health risk. Exposure can lead to severe health effects like cancer, genetic mutations, and acute radiation sickness. Therefore, strict precautions, including robust shielding like thick concrete barriers, are essential to protect people from harmful radiation exposure, regardless of the physical size or mass of the source.

The problem states that the radiation intensity depends on the thickness of the concrete barrier as shown in Table 1. However, Table 1 and the specific questions for Item 2 are not visible in the provided image. Without this information, I cannot proceed with any calculations or further analysis related to the radiation intensity and concrete thickness.