In photo-extinction method, a source of light is directed through a suspension of ____________
A. Kerosene in cement
B. Cement in kerosene
C. Cement in water
D. Water in cement
Answer:B
In photo-extinction method, a source of light is directed through a suspension of ____________
A. Kerosene in cement B. Cement in kerosene C. Cement in water D. Water in cement
Explanation: In photo-extinction method, a source of light is directed through a