M

Mr. Dubey • 52.30K Points
Coach 

Q. In the method of microscopic inspection what is the angle of beam light with the work?

(A) 200
(B) 300
(C) 600
(D) 900
Correct : Option (C)

Explanation: 
 in one method of microscopic inspection, a straight edge is placed on the surface to be inspected and a beam of light is projected at about 60 degree to the work. the shadows cast into the surface scratches are magnified and studied.

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