Question

Drow all the ray digram by concave mirror

Answer 1

o draw these diagrams, we will have to recall the two rules of reflection for concave mirrors:

Any incident ray traveling parallel to the principal axis on the way to the mirror will pass through the focal point upon reflection.

Any incident ray passing through the focal point on the way to the mirror will travel parallel to the principal axis upon reflection.

Earlier in this lesson, the following diagram was shown to illustrate the path of light from an object to mirror to an eye.

In this diagram five incident rays are drawn along with their corresponding reflected rays. Each ray intersects at the image location and then diverges to the eye of an observer. Every observer would observe the same image location and every light ray would follow the law of reflection. Yet only two of these rays would be needed to determine the image location since it only requires two rays to find the intersection point. Of the five incident rays drawn, two of them correspond to the incident rays described by our two rules of reflection for concave mirrors. Because they are the easiest and most predictable pair of rays to draw, these will be the two rays used through the remainder of this lesson.

Answer 2

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The rules used for drawing ray diagrams for the formation of an image by a concave mirror are:

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.

Explanation:

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