Image in Thin Lens by Ray Tracing
For a converging lens, if the object is placed between 2F1 and F1 the image will be formed.
Between F2 and 2F2
A screen is placed at a distance 40 cm away from an illuminated object. A converging lens is placed between the source and the screen and it is attempted to form the image of the source on the screen. If no position could be found, the focal length of the lens
Must be less than 10 cm
Must be greater than 10 cm
Must not be greater than 20 cm
Must not be less than 10 cm
An object of length 2.0 cm is placed perpendicular to the principal axis of a convex lens of focal length 12 cm. Find the size of the image if the object is at a distance of 8.0 cm from the lens.
A pin of length 2.00 cm is placed perpendicular to the principal axis of a converging lens. An inverted image of size 1.00 cm is formed at a distance of 40.0 cm from the pin. Find the focal length of the lens and its distance from the pin.
A convex lens A of focal length 20 cm and a concave lens B of focal length 5 cm are kept along the same axis with a distace d between them. If a parallel beam of light falling on A leaves B as a parallel beam, then d is equal to
An object is placed at a distance of f2 from a convex lens. The image will be formed:
At −f, virtual and double its size.
At −2f, virtual and erect.
At f, real and inverted.
- At 2f, real and erect.
- 5 cm
- 2.5 cm
- 10 cm
- 0.7 cm
- 1.4 cm
- 2.8 cm
- Zero (i.e. point image)