Visible Light

Visible light is a form of electromagnetic radiation that is visible to the human eye. It is a small portion of the electromagnetic spectrum and is responsible for the sense of sight in humans.

Properties of Visible Light

• Wavelength: Visible light ranges in wavelength from approximately 400 to 700 nanometers. Different wavelengths of visible light correspond to different colors, with shorter wavelengths appearing blue or violet, and longer wavelengths appearing red.
• Speed: In a vacuum, visible light travels at a speed of approximately 299,792 kilometers per second.
• Reflection and Refraction: Visible light can be reflected and refracted when it encounters different surfaces and mediums, allowing us to see objects and images.

Study Guide

Here are some key points to remember about visible light:

1. What is visible light?

Visible light is a form of electromagnetic radiation that is visible to the human eye.

2. What is the range of wavelengths for visible light?

Visible light ranges in wavelength from approximately 400 to 700 nanometers.

3. How does visible light allow us to see objects?

Visible light can be reflected and refracted when it encounters different surfaces and mediums, allowing us to see objects and images.

4. What are the primary colors of visible light?

The primary colors of visible light are red, green, and blue, which can be combined to create different colors in the visible spectrum.

Understanding the properties and behavior of visible light is essential for understanding how we perceive the world around us and the science of optics.

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