This chapter highlights the sensory world and relates it to the form of energy that makes things visible. The Chapter "Light" explores many roles of light and its effects in our daily lives. This chapter also provides students with knowledge about how objects are visible to the naked eye, the importance of light, terms related to light, and the principle behind the vision of objects. Therefore, students have sufficient control of the theoretical and practical approaches.
The main highlight of this chapter is these two fundamental things –
1. Laws of reflection
2. Human eye principle
The chapter also tells us about the laws of reflection with well-described concepts of the ray diagrams with a slight mention of two types of light sources: luminous and non-luminous. Students learn more about numerical problems dealing with incidence and reflection so that young learners understand the concept thoroughly. The chapter also teaches students to focus on regular and diffused reflections and their involvement with everyday objects.
The lesson introduces the students to the difference between real and virtual images to clarify how image formation occurs. Then, the lesson focuses more deeply on the dispersion phenomenon responsible for the rainbow formation. The chapter further explains the different light phenomena: multiple reflections, lateral inversion, and the principle behind the operation of the periscope. Students can also learn about various devices that work on this principle of light phenomena.
The chapter also covers the human eye and its functioning. It explains the various parts of the anatomy of the eye, explaining how the optic nerves carry the rays of light from the retina of the eye to the brain. Students learn about the range of vision and various deficiency or defects occurring in the eye, forming a unique scope in prospects. The chapter concludes with the section on visually impaired people and the Braille system for them