Draw ray diagrams to represent the nature, position and relative size of the image formed by a convex lens for the object placed: at 2F1, When an object is placed at 2F1 , the image so formed by the convex lens is at 2F. This image is real, inverted and of same size as the object as shown in the figure. Is there an error in this question or solution?
There are six possibilities of position of object in the case of convex lens: Convex lens converge parallel rays coming from objet at infinity and a highly diminished - point sized, real and inverted image is formed at principal focus F2. Fig: Object at Infinity Properties of Image: Image is highly diminished, real and inverted. A diminished, real and inverted image is formed between principal focus, F2 and centre of curvature, C2 at the opposite side when an object is placed beyond C1 of a convex lens. Fig: Object Beyond 2F Properties of Image: Image is diminished, real and inverted. A same sized, real and inverted image is formed at centre of curvature, C2 when object is placed at centre of curvature, C1 of a convex lens. Fig: Object at 2F Properties of Image: Image is same size as object, real and inverted. An enlarged, real and inverted image is formed beyond centre of curvature, C2 when an object is placed between centre of curvature, C1 and principal focus, F1 of a convex lens. Fig: Object between 2F and F Properties of Image: Image is enlarged, real and inverted. An infinitely large, real and inverted image is formed at infinity when object is placed at principal focus, F1 of a convex lens. Fig: Object at F Properties of Image: Image is highly enlarged, real and inverted. A virtual, erect and enlarged image is formed at the same side of lens, when an object is placed between principal focus, F1 and optical centre, O of a convex lens. Fig: Object between F and O Properties of Image: Image is enlarged, virtual and erect. Copyright © excellup 2014 |