Draw ray diagram in each of the following cases to show what happens after reflection to the incident ray when (a) it is parallel to the principal axis and falling on a convex mirror. (b) it is falling on a concave mirror while passing through its principal focus. (c) it is coming oblique to the principal axis and falling on the pole of a convex mirror.
Answers
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In the case of concave mirror:
A Ray parallel to principal axis passes through the principal focus after reflection from a concave mirror.
parallel rays concave mirror
Similarly, all parallel rays to the principal axis pass through the principal focus after reflection from a concave mirror. Since, a concave mirror converge the parallel rays after reflection, thus a concave mirror is also known as converging mirror.
In the case of convex mirror:
A ray parallel to principal axis appears to diverge from the principal focus after reflecting from the surface of a convex mirror.
parallel rays convex mirror
Similarly, all rays parallel to the principal axis of a convex mirror appear to diverge or coming from principal focus after reflection from a convex mirror. Since, a convex mirror diverges the parallel rays after reflection, thus it is also known as diverging mirror.
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Answer:
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Explanation:
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In the case of concave mirror
A ray parellel to principal axis passes through the principal focus after reflection from a concave mirror .