Of the eighteen elements in the fourth period, which a. has the largest atomic radius? b. has the smallest first ionization ener
1 answer:
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Answer:
critical angle is the angle of incidence in optically denser medium, for which the angle of reflection in the less denser medium is 90 degree
Explanation:
total internal reflection occurs at one particular angle of incidence where the reflected ray lies on the boundary.
this angle is called the critical angle
