betalight
betalight · betalights
A sealed capsule, internally coated with a phosphor and filled with a tritium whose…A sealed capsule, internally coated with a phosphor and filled with a tritium whose beta decay causes the phosphor to glow.
A sealed capsule, internally coated with a phosphor and filled with a tritium whose…A sealed capsule, internally coated with a phosphor and filled with a tritium whose beta decay causes the phosphor to glow.