This means that the object is further away than two principal focal lengths from the convex lens.
The ray diagram below shows you where the image will be located using the two rules:
- From the object, pass a parallel line through the principal focal point.
- From the object, pass a ray line through the centre of the convex lens.
We can observe from these ray diagrams that any object more than two principal focal lengths (more than `2F`) from the lens will always be located between one principal focal length and two principal focal lengths (between `1F` and `2F`) on the opposite side of the lens. The image will always be inverted and smaller. All these images can be captured on a screen so they must be real images.
In summary this would be:
Or to make it really simple:
Or as a block diagram
Hint: This can be determined by using a ray diagram which gives the information about position of the object and the image, nature of the image and size of the image using cartesian sign convention.
Complete step by step answer:
Lens is a piece of transparent material with two or at least one curved surface and its refractive index is different from the surroundings.Convex lens is a lens is a lens with two curved surfaces and converges light which passes through it.Let us consider a convex lens and ray- diagram of a convex lens.When an object is placed at twice the focal length i.e.,2F image is also formed at 2F on the other side of the length.The image formed is inverted as it looks upside down as that of an object and it can be caught on the screen, so it is a real image. The height of the image is the same as that of the object, so it is the same sized image.Let us draw a ray diagram considering focal length f= 4cm and size 3cm. So, when an object is placed at 8cm that is 2f distance then image formation its position height shape and size is as shown below: