Α Alpha (al-fah) Β Beta (bay-tah) Γ Gamma (gam-ah) Δ Delta (del-tah) Ε Epsilon (ep-si-lon) Ζ Zeta (zay-tah) Η Eta (ay-tah) Θ Theta (thay-tah) Ι Iota (eye-o-tah) Κ Kappa (cap-pah) Λ Lambda (lamb-dah) Μ ...

The thicker the substance, the more the radiation is absorbed. Alpha, beta and gamma radiations penetrate materials in different ways. Alpha radiation is the least penetrating. It can be stopped ...