Question

how do you identify the focal point of a bi-concave lens explain with the help of a ray diagram​

Answer 1

Answer:

Explanation:

Any incident ray traveling towards the focal point on the way to the lens will ... The three rays should be diverging upon refraction. 3. Locate and mark the image of the top of the object.

Answer 2

The focal point of a concave lens is the point where light rays parallel to the axis seem to diverge from after passing through the lens. The distance from the lens to this point is called the focal length of the lens.

Because it seems rather odd to represent light as a dark line on a white page, the diagram above has been inverted below to show white light on a black background. The principle is the same.