How does focal length of a convex lens change with increase in wavelength of incident light?
Important Questions on Refraction of Light at Spherical Surfaces : Lenses
Under what condition is the first focal length of a lens not equal to its second focal length?
The image of an object, placed at a distance of from a lens, is formed at a distance of on the other side of the lens. If the object is placed at a distance of from the lens, find the position of the image.
A convex lens forms a virtual image of an object. Where is the object? Answer in terms of focal length.
Where should an object be placed in order to form an image of the same size by a convex lens? Can it happen in case of a concave lens also?
In an attempt to get a picture of Zebra, a person pastes black paper leaves on the lens of his camera and takes the photo of a white horse. Will he get the picture of Zebra?
What happens when a convex lens of refractive index is immersed in a liquid of refractive index ?
Under what condition does a lens become invisible when immersed in a transparent liquid?
