Explain the meaning of focus of a concave lens.
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i am explaining the principal focus / focal point.
the principal focus of a spherical mmirrors or u can say concave mirror is the point on the principal axis where all incident rays parallek to thecprincipal axis meet as shown in the figure in concave mirrors or appear to meet in convex mirrors after reflection from the mirror as shown in the next figure.
u can say that principal focus is the focus of the concave mirrors.
hope this helps.
the principal focus of a spherical mmirrors or u can say concave mirror is the point on the principal axis where all incident rays parallek to thecprincipal axis meet as shown in the figure in concave mirrors or appear to meet in convex mirrors after reflection from the mirror as shown in the next figure.
u can say that principal focus is the focus of the concave mirrors.
hope this helps.
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