The picture shows the path of light as it travels from one medium to another.
What is medium 1 and medium 2?
Important Questions on Light - Reflection and Refraction
When a lens in placed at Q, a sharp image is formed on the screen. The image formed is real, inverted and diminished. When the lens is moved to P, another sharp image is formed on the screen.
What is the nature of the image formed when the lens is at P?
The diagram below shows the image of a candle, as formed through refection from a concave mirror, obtained on a screen.
How many light rays from the point P on the candle flame can be drawn to the corresponding point on the image P'?
The images formed by an ordinary convex lens suffer from a defect, called chromatic defect, which leads to false coloured edges in the images. This happens because light rays of different colours bend differently as they enter and leave the lens.
If a parallel white light beam passes through a convex lens, the light of which colour (among violet to red in the spectrum) will converge at a point closest to the lens? Justify your answer.
