Question

if the principal focus is our main focus then does the image form at the focus​

Answer 1

Answer:

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• Object at infinity
• Object between infinity and centre of curvature (C)
• Object at centre of curvature (C)
• Object between centre of curvature (C) and Principal focus (F)
• Object at Principal Focus (F)
• Object between Principal Focus (F) and Pole (P)