1. USES OF RADIO ACTIVITY
MEDICAL
SCIENTIFIC
INDUSTRIAL FIELD

2. MEDICAL USE
LEUKEMIA, CANCER ARE CURED BY RADIO THERAPY. GAMMA RADIATIONS FROM COBALT 60 ARE USED TO TREAT CANCER
SALTS OF WEAK ISOTOPES (TRACERS) ARE USED TO DETECT SUSPECTED BRAIN TUMOURS AND BLOOD CLOTS
GAMMA RAYS EMITTED BY RADIO ISOTOPES ARE USED TO STERILIZE BANDAGES, DRESSINGS, SYRINGES

3. SCIENTIFIC USE
ALPHA PARTICLES EMIITED FROM RADIO ISOTOPES ARE USED AS PROJECTILES OR NUCLEAR REACTIONS
TRACERS ARE USED IN AGRICULTURE SCIENCE TO STUDY THE GROWTH OF PLANT
AGE OF EXCAVATED MATERIAL IS ESTIMATED BY DECAY OF CARBON - 14

4. INDUSTRIAL USE
URANIUM 235 IS USED AS FUEL FOR ATOMIC REACTORS
THE PENETRATING POWER OF BETA RADIATIONS ARE USED TO CONTROL THE THICKNESS OF PAPER, ELASTIC AND METAL SHEETS
IONISING EFFECT OF RADIATIONS ARE USED IN MAKING CERTAIN LUMINESCENT SIGNS