Name the spherical mirror(s) that has/have i) Virtual principal focus ii) Real principal focus
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what is virtula principal
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answer :-
(i) convex mirror
(ii) concave mirror
explanation :- we know, when rays parallel to the axis converge to the fixed point F is known as real principle focus of concave mirror.
and when rays parallel to the axis diverge as through coming from the fixed point F is known as virtual principle focus of comvex mirror.
for better understanding , a rough daigram is shown in figure.
in first graph, F indicates real principle focus of concave mirror.
in 2nd graph, F indicates virtual principle focus of convex mirror.
(i) convex mirror
(ii) concave mirror
explanation :- we know, when rays parallel to the axis converge to the fixed point F is known as real principle focus of concave mirror.
and when rays parallel to the axis diverge as through coming from the fixed point F is known as virtual principle focus of comvex mirror.
for better understanding , a rough daigram is shown in figure.
in first graph, F indicates real principle focus of concave mirror.
in 2nd graph, F indicates virtual principle focus of convex mirror.
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