It is false :D I am 95% sure
Answer:
Cobalt Sources
Cobalt-60 is used as a radiation source in many common industrial applications, such as in leveling devices and thickness gauges. It is also used for radiation therapy in hospitals. Accidental exposures may occur as the result of loss or improper disposal of medical and industrial radiation sources.
Explanation:
Answer:
concave lens
Explanation:
it's concave lens because it diverges the ray/beam of light.
Its either C or D I’m stuck on this.