Study the data given below showing the focal length of three  concave mirror A , B, and C and the respective distance of object placed in front of the mirror : casev first second third. mirror a, b, c ,
focal and centimetre 20, 15 ,30
object distance centimetre 45 ,30 ,20,
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 my question is what is the nature and size of the names formed by Meer sea draw a diagram to justify your answer

Class 10th subject science chapter light and refraction and reflection