CBSC Session 2022-23.
Sample Papers of Class 10th, Science.
NCERT Important Questions of Class 10th Science.
NCERT Science Solutions of Class 10th.
NCERT book extra Questions.
CBSC Board and other State board.
To construct ray diagrams, two rays of light are generally so chosen that it is easy to determine their directions after reflection from a mirror. Choose two such rays and state the path/direction of these rays after reflection from a concave mirror. Use these two rays to find the position and nature of the image of an object placed at a distance of 8 cm from a concave mirror of focal length 12 cm.
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The candidate may choose any two of the following rays:
(i) A ray parallel to the principal axis, after reflection, will pass through the principal focus
of a concave mirror.
(ii) A ray passing through the principal focus of a concave mirror after reflection will emerge
parallel to the principal axis.
(iii) A ray passing through the center of curvature of a concave mirror after reflection is
reflected back along the same path.
(iv) A ray incident obliquely to the principal axis towards the pole of a concave mirror is reflected obliquely; making equal angles with the principal axis
Using the ray number (iii) and (iv) we can draw the required ray diagram.