Types Of Radiation

The video tutorial explains the discovery of radioactivity, starting with uranium's effect on photographic paper. It introduces the three types of radiation: alpha, beta, and gamma. Alpha radiation is easily stopped by air or paper and is heavily charged. Beta radiation is more penetrating, stopped by aluminum, and has a negative charge. Gamma radiation is the most penetrating, being a wave with no charge or mass, and is stopped by lead.

What was the first evidence of radioactivity discovered?

Describe the characteristics of alpha radiation.

How does beta radiation differ from alpha radiation?

What is the most penetrating type of radiation and why?

Explain why gamma radiation is difficult to stop.