Write three characteristics of the image formed by a convex lens when the object is placed at a distance greater than twice the focal length of the convex lens.

What would your image look like if you stand close to a large concave mirror?

What would your image look like in a convex mirror?

What type of images can a convex lens make?

What type of image is always made by a concave lens?

How can you show that white light (say, sunlight) consists of seven colours?

Name the scientist who discovered that sunlight consists of seven colours.

State any two observations from everyday life which show that light travels in straight lines.