Question

not blocked completely blocked by lead.
select
select
alpha radiation
beta radiaion
gamma radiation
question 14
select

Explanation:

To determine which radiation is not completely blocked by lead, we analyze the penetration abilities:

• Alpha radiation: Can be blocked by a sheet of paper or skin, so it is easily blocked.
• Beta radiation: Requires a few millimeters of aluminum to block, and lead does not completely block it (it can penetrate thin lead but is attenuated).
• Gamma radiation: Requires thick lead or concrete to block, so it can be completely blocked by sufficient lead.

So the radiation not completely blocked by lead is Beta Radiation (note: there's a typo in the option as "Beta Radiaion", but it's the intended option).

Answer:

Beta Radiaion (Note: Likely a typo, intended as Beta Radiation)