Assertion : We can decide the nature of a mirror by Observing the size of erect image in the mirror. Convex mirror Plane mirror Concave mirror Reason : The minimum distance between a real object and its real image in a concave mirror is non zero.
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Answer:
C A is true but R is false
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Assertion is true but reason is false.
Explanation:
- An erect image is a virtual image. It is either larger, smaller or equal to the object size depending on the nature of mirror.
- A convex mirror always form virtual and erect image no matter where the object is located. An erect image formed by a convex mirror is always diminished i.e. smaller than object.
- A concave mirror forms real as well as virtual image. Virtual image is formed in concave mirror when the object is placed between focus and pole. The erect and virtual image formed in concave mirror is magnified i.e. larger than the object size.
- Plane mirror forms virtual images only. These virtual and erect images formed by plane mirrors are of same size as object.
So, we can decide the nature of a mirror by Observing the size of erect image in the mirror.
Minimum distance between a rea object and real image in a concave mirror is zero. An object kept at centre of curvature forms a real image on the centre of curvature which makes the distance between object and mirror equal to zero.
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