Question

A coin placed at a focal point of a converging lens. is an image is formed? what is its nature?

Answer 1

Answer: The image is formed at infinity and its nature is virtual

A converging lens is a type of optical lens that is thicker at the center than at its edges; this type of lens concentrate or converge (that is why its name) at a point the rays of light that pass through it.

If we talk about the formation of the image, its location and nature will depend on where the object is located with respect to the focal length of the lens. So, in general:

- If the object is considerable away from the focal point, a real image (which can be projected on a screen) will be formed, inverted and smaller than the object.

-If the object is very close to the focal point, a virtual image will be observed (it is given this name because the image can not be projected on a screen) upright and bigger than the object.

Now, if the object is placed right at the focal point, the image would be formed at infinity (therefore, we would not see it) and its nature would be virtual.

According to this, the image of the coin will not be seen.