Light Energy

This topic explains the refraction phenomenon, when a ray of light passes from one optical medium to another medium and deviates. Snell’s Law of Refraction states that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant.

This topic emphasizes the effects of refraction of light in everyday life. With the help of a picture, it describes the effect of refraction. Further, it states that twinkling of stars and mirages are the result of refraction of light.

In this topic, we will study the dispersion of white light by a prism along with an activity. It explains the splitting of white light and the reasons why dispersion occurs. We will also learn about the formation of rainbow.

This topic states that a spherical mirror has a curved reflecting surface and it is of two types. A convex mirror or diverging mirror has its reflecting surface bulging outwards. A concave mirror or converging mirror has its reflecting surface caving inwards.

In this topic, we will know about the spherical lenses with their classification into convex lens and concave lens. We will also learn that the lenses can change the direction of light with their uses.