Scattering
Scattering is the redirection of light in many directions when light hits tiny particles in a medium.
Practice This ConceptMain explanation
Teacher explanation
When sunlight enters the atmosphere, tiny dust particles and gas molecules scatter the light. Shorter wavelengths such as blue scatter more strongly than longer wavelengths like red. That is why the sky looks blue in the daytime and why the Sun looks red at sunrise and sunset.
Example
On a clear day, the sky appears blue because blue light is scattered strongly by air molecules.
Simple analogy
Short waves scatter more, so blue spreads more.
Common confusion
Students often think the sky is blue because the atmosphere itself is blue. The color is due to scattering of sunlight, not because air has color.
Exam tip
For a strong answer, mention that shorter wavelengths scatter more and connect it to sky color.
Answer writing and exam use
1-mark use
Write the exact meaning of scattering in one clean line.
2-mark use
Define scattering and add one example or condition.
3-mark use
Explain scattering, show the method or example, and mention the common mistake.
Practice this concept with focused MCQs
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