Question
Write the rules for the construction of image by Concave mirrors, along with ray diagram. .
✓
Answer
(i) Rule 1 : A ray passing through the centre of curvature is reflected back along its own path.
(ii) Rule 2 : A ray parallel to the principal axis passes through the focus after reflection
(iii) Rule 3 :A ray passing through the focus gets reflected and travels parallel to the principal axis.
(iv) Rule 4 : A ray AP incident at the pole of the mirror gets reflected along a path PB
such that the angle of incidence APC is equal to the angle of reflection BPC.
(ii) Rule 2 : A ray parallel to the principal axis passes through the focus after reflection
(iii) Rule 3 :A ray passing through the focus gets reflected and travels parallel to the principal axis.
(iv) Rule 4 : A ray AP incident at the pole of the mirror gets reflected along a path PB
such that the angle of incidence APC is equal to the angle of reflection BPC.
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