Which among the following is an example of Diffraction?
Which among the following is an example of Diffraction?
AThe blue color of the sky
BThe twinkling of the stars
CThe Tyndall effect
DRainbow patterns found on a CD
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correct answer is: option d (Rainbow patterns found on a CD)
Explanation: Diffraction is the bending of waves (including light) as they pass around an obstacle or through an aperture. Rainbow patterns found on a CD are caused by the diffraction of white light by the closely spaced tracks on the CD's surface, which act as a diffraction grating.
- Option a: The blue color of the sky is due to Rayleigh scattering, where shorter wavelengths of light (like blue) are scattered more by the atmosphere's particles.
- Option b: The twinkling of the stars is caused by atmospheric refraction, where light from stars is bent as it passes through different layers of the atmosphere with varying densities.
- Option c: The Tyndall effect is the scattering of light by particles in a colloid or suspension, making the beam of light visible. This is also a scattering phenomenon, but not diffraction.
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