Question

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Answer 1

A ray diagram is a representation of the possible paths light can take to get from one place to another. ... A sharp real image (an image that can be displayed on a screen) is formed when all rays from one point on an object arrive at a unique point on the image.

Any ray of light that passes through the mirror, is always parallel to the principal axis.

Any ray of light that passes through the mirror always passes through the principal focus (f) of the mirror after reflection.

A ray of light passing through the center of curvature of any mirror is reflected back along the same path.

Any incident ray which isn’t parallel to the principal axis is also reflected diagonally and the incident ray and the reflected ray always follow the laws of reflection i.e. the angles formed by these rays are equal to each other.

Answer 2

Answer:

Rules used for drawing ray diagrams for the formation of an image by a convex lens : (1) When the incident ray is parallel to the principal axis, the refracted ray passes through the principal focus. (2) When the incident ray passes through the principal focus , the refracted ray is parallel to the principal axis