Question

How to draw a ray diagram where the object is placed at the focus of a Concave mirror

Answer 1

Answer: First, we need to place the object at focus and the object should be of some height but not a point size object

now draw a light ray parallel to principal axis which hits the concave mirror and converges and moves towards principal axis

the second ray should pass through the pole and pass

the two rays do not meet in front of the mirror and are parallel. but if you extend them backside beyond the mirror the meet at a point . the image is formed beyond the mirror .

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