Step 1 To answer the question "What is light and properties of light?", we first need to understand what light is. Light is a form of electromagnetic radiation that is visible to the human eye. It is a form of energy that enables us to see the world around us. Step 2 The properties of light include several key characteristics. These are: 1. *Reflection*: Light bounces back when it hits a surface. This is why we can see ourselves in mirrors. 2. *Refraction*: Light bends when it passes from one medium to another with a different optical density. This is the principle behind lenses and prisms. 3. *Diffraction*: Light bends around obstacles or through small openings, creating interference patterns. 4. *Interference*: Light waves can overlap and either reinforce or cancel each other out, depending on their phase difference. 5. *Polarization*: Light can be polarized, meaning its electric field oscillates in a particular direction. This is used in polarized sunglasses to reduce glare. 6. *Speed*: The speed of light in a vacuum is a constant (approximately 299,792 kilometers per second), but it varies in different media. 7. *Wavelength and Frequency*: Light has both wavelength (the distance between successive peaks or troughs) and frequency (the number of oscillations per second). The product of wavelength and frequency equals the speed of light. Step 3 To provide a comprehensive answer, we should summarize the key points about light and its properties. The final answer is: Light is a form of electromagnetic radiation visible to the human eye. Its properties include reflection, refraction, diffraction, interference, polarization, and it has a constant speed in a vacuum but varies in different media. Light also has characteristics such as wavelength and frequency.

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