Science
Where should an object be placed in front of a convex lens to get a real image of the size of the object?
- At the principal focus of the lens
- At twice the focal length
- At infinity
- Between the optical centre of the lens and its principal focus.
Related Questions
Which one of the following materials cannot be used to make a lens?
- Water
- Glass
- Plastic
- Clay
The image formed by a concave mirror is observed to be virtual, erect and larger than the object. Where should be the position of the object?
- Between the principal focus and the centre of curvature
- At the centre of curvature
- Beyond the centre of curvature
- Between the pole of the mirror and its principal focus.
A spherical mirror and a thin spherical lens have a focal length of -15 cm. The mirror and the lens are likely to be
- both concave
- both convex
- the mirror is concave, and the lens is convex
- the mirror is convex, but the lens is concave
No matter how far you stand from a mirror, your image appears erect. The mirror is likely to be
- only plane
- only concave
- only convex
- either plane or convex