The blue colour of the sky is due to___________________?
Correct answer: D. scattering
- A. diffraction
- B. reflection
- C. polarization
- D. scattering
Explanation
The sky appears blue because air molecules scatter shorter wavelengths more strongly than longer wavelengths, and blue light is scattered widely across the sky. Students may choose reflection because sunlight reaches the atmosphere and then the eye, but the relevant process is wavelength-dependent scattering.
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About Optics
Light is studied through reflection, refraction, dispersion, interference, diffraction and polarization, linking ray behavior with its wave nature. Questions may involve mirrors, lenses, optical instruments, refractive index and image formation, while geometrical optics deals with rays and wave optics explains effects such as interference and diffraction.
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