6. Light
Light is a vital form of energy that allows perception of objects through its travel in straight lines at a speed of 3 × 10^8 m/s. Its characteristics include reflection, refraction, and dispersion, and it demonstrates both wave-like and particle-like properties. Understanding the laws and types of reflection, as well as the behavior of plane mirrors, enables practical applications in various optical instruments.
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What we have learnt
- Light is essential for vision and travels in straight lines.
- Reflection occurs when light bounces off surfaces, following specific laws.
- Plane mirrors create virtual images with unique characteristics.
Key Concepts
- -- Rectilinear Propagation
- The principle that light travels in straight lines.
- -- Laws of Reflection
- The incident ray, reflected ray, and normal lie in the same plane; the angle of incidence equals the angle of reflection.
- -- Lateral Inversion
- The phenomenon where left appears as right and vice versa in a plane mirror.
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