Focal length of mirror is -20 cm what should be the mirror structure convex or concave
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The mirror structure of focal lenght -20cm is a concave mirror.
By using sign convention focal lenght of a concave is negative whereas for convex it is positive.
By using sign convention focal lenght of a concave is negative whereas for convex it is positive.
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concave because focal length of concave mirror is negative
hope it helps you
hope it helps you
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