A) \[{{90}^{o}}\]
B) \[{{60}^{o}}\]
C) \[{{45}^{o}}\]
D) \[{{0}^{o}}\]
Correct Answer: D
Solution :
When a ray of light incident on concave mirror from its centre of curvature it retraces the path of the incident ray i.e., it goes along the same path. Hence incident ray coincides with the normal. So angle of the incidence is zero.
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