Question

Write any two rules which are useful in drawing ray diagram?​

Answer 1

Answer:

There are some rules to draw the ray diagrams in optics they are majorly three:

1)the incident ray must be parallel to the principle axis and the reflected ray must pass through the focus of the curvature.

2)the angle of incidence is equal to the angle of reflection.

3)the distances above principle axis taken as positive and below values as negative and in the direction of the incident ray taken as positive opposite to the incident ray is negative.

These three are major rules to draw the ray diagrams in optics

Explanation:

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Answer 2

Answer:

Rule 1: If the incident ray is parallel to the principal axis then the reflected ray passes through the focus of the concave mirror.

Rule 2: If the incident ray passes through the focus of the concave mirror, the reflected ray is parallel to the principle axis.

Rule 3: If the incident ray passes through the centre of curvature of the concave mirror, the reflected ray traces the same path.