If by "then" you meant "than", then the answer could be a straight angle.
A 'critical angle', is bascially the smallest angle of incidence for which light can be totally reflected. Incidence is the arrival of a particle or beam of light at a surface. I.e. If a beam of light hits a desktop at the angle of 45 degrees, the angle of incidence will be 45 degrees.
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Explain what is meant by the term 'dementia.'
The term angle of deviation is used in reference to a prism.
There is no angle to refer to in this question. Therefore, no answer can be given as to which term best describes the angle referred to.
Tagalog Translation of ANGLE: anggulo