ready_for_the_spotlightLight_Presentation.pptx

Light

1. Light – The Source of Energy and Vision Exploring the nature, behavior, and importance of light

2. Introduction Light is a form of energy that enables us to see the world around us. It travels in straight lines and moves at an incredible speed of about 3 × 10⁸ m/s. It can be natural (from the Sun) or artificial (from bulbs and lamps).

3. Nature of Light Light has a dual nature: it behaves as both a wave and a particle. As a wave, it shows reflection, refraction, and interference. As a particle (photon), it carries energy in small packets called quanta.

4. Sources of Light Natural sources: Sun, stars, fireflies. Artificial sources: Electric bulbs, LEDs, candles, lasers. Bioluminescence is a natural phenomenon where living organisms emit light.

5. Properties of Light Reflection – Bouncing of light from a surface. Refraction – Bending of light when it passes from one medium to another. Dispersion – Splitting of light into seven colors (VIBGYOR). Diffraction and Interference – Wave-like behavior of light.

6. Reflection of Light Light reflects off smooth surfaces like mirrors. Follows the laws of reflection: Angle of incidence = Angle of reflection. Used in devices like periscopes, telescopes, and cameras.

7. Refraction of Light Occurs when light changes medium (e.g., air to water). Responsible for phenomena like the bending of a straw in water. Used in lenses, eyeglasses, and microscopes.

8. Dispersion of Light White light splits into seven colors when passing through a prism. Discovered by Isaac Newton. Creates natural wonders like rainbows.

9. Importance of Light Essential for vision and photosynthesis. Used in communication (fiber optics). Supports medical imaging and laser technologies. Plays a key role in art, photography, and culture.

10. Conclusion Light is fundamental to life, technology, and science. It reveals the beauty of the universe and drives countless innovations. Understanding light helps us explore and appreciate the world around us.