A narrow and parallel beam of white light is incident on a convex lens, parallel to its principal axis. Draw a labelled diagram to show how coloured images are formed by the lens.

A parallel beam of light is incident on a converging lens parallel to its principal axis. As one moves away from the les on the other side on its principal axis, the intensity of light

A ray of light, after refracting through a concave lens, emerges parallel to the principal axis. Draw a ray diagram to show the incident ray and its corresponding emergent ray.

A real image of a distant object is formed by a plano-convex lens of its principal axis. Spherical aberration

A narrow beam of white light goes through a slab having parallel faces.

Draw a ray diagram to show how a convex lens can be used as a magnifying glass.

A lens forms an erect, magnified and virtual image of an object. Draw a labelled ray diagram to show the image formation.

A parallel beam of light, parallel to the principal axis of a concave mirror, on reflection meets at the :

Draw a ray diagram showing the dispersion through a prism when a narrow beam of white light is incident on one of its refracting surface. Also indicate the order of the colours of the spectrum obtained.

A parallel narrow beam of light is incident on the surface of a transparent hemisphere of radius R and refractive index mu=1.5 as shown. The position of the image formed by refraction at the image formed by refraction at the spherical surface only as

A parallel beam of white light falls on a combination of a concave and a convex lens, both of the same material. Their foacl lengths are 15cm and 30cm, respectively for the mean wavelength in white light. On the other side of the lens system, one sees colored patterns with violet color at the outer edge.