Question

draw the ray diagram when parallel beam of light ray makes an angle with the principal axis

plzzans fast​

Answer 1

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A beam of light parallel to the principal axis of a concave mirror converges to a point.

Explanation:

When a beam of light passes parallel to the principal axis of a concave mirror the beam converges, which meet at the "Focus"

•  The image formed is real, and reduced size.

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Not just for concave mirror, for any mirror or lens a beam of light coming from infinity and parallel to the principal axis will fall on the focal of the mirror/lens.

Refer the attachment !!

Answer 2

A beam of light parallel to the principal axis of a concave mirror converges to a point.

Explanation:

When a beam of light passes parallel to the principal axis of a concave mirror the beam converges, which meet at the "Focus"

The image formed is real, and reduced size.

Not just for concave mirror, for any mirror or lens a beam of light coming from infinity and parallel to the principal axis will fall on the focal of the mirror/lens.