Question

When a convex lens focuses light to form a real image, how does the path of the ray going through the centre compare?

Options

• It converges to the reflecting surface MN.

• It forms a reflected wavefront CE.

• It travels through the greatest thickness of glass in a prism.

• It travels a shorter path.

Answer 1

The ray going through the centre travels a shorter path. Its passage through glass, where the speed is slower, balances this shorter distance.