What is Reflection? Definition, Meaning & Example
The bouncing back of light from a surface when it strikes the surface and cannot pass through.
TL;DR: The bouncing back of light from a surface when it strikes the surface and cannot pass through.
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Reflection: The bouncing back of light from a surface when it strikes the surface and cannot pass through.
Explanation
Reflection follows the law of reflection: the angle of incidence equals the angle of reflection, both measured from the normal to the surface. Smooth surfaces like mirrors produce regular reflection where parallel light rays reflect as parallel rays, forming clear images. Rough surfaces produce diffuse reflection where light scatters in all directions. This is why you see a clear image in a mirror but not on rough paper. Understanding reflection is important for designing optical instruments and understanding how we see objects.
Example
When you look in a mirror, light from your face reflects off the smooth mirror surface and enters your eyes, allowing you to see your reflection at the same distance behind the mirror as you are in front of it.
Frequently Asked Questions
What is the difference between reflection and refraction?
Reflection is when light bounces off a surface and stays in the same medium, while refraction is when light bends as it passes into a different medium.
Why is a rough surface different from a smooth surface for reflection?
A smooth surface reflects all rays at the same angle creating a clear image, while a rough surface has an uneven surface causing rays to scatter in different directions.
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