Class 12PhysicsRay Optics and Optical InstrumentsScattering of light and Some Natural Phenomenon of Sunlight
MediumWhy does the Sun look reddish at the time of sunrise and sunset?
At sunrise or sunset,the Sun is near the horizon. The light from the Sun has to travel a larger distance through the Earth's atmosphere to reach our eyes.
During this journey,most of the blue light and other shorter wavelengths are scattered away by the atmospheric particles (Rayleigh scattering).
Only the light with longer wavelengths,such as red light,is able to reach our eyes as it is the least scattered.
Therefore,the Sun appears reddish at the time of sunrise and sunset.
During this journey,most of the blue light and other shorter wavelengths are scattered away by the atmospheric particles (Rayleigh scattering).
Only the light with longer wavelengths,such as red light,is able to reach our eyes as it is the least scattered.
Therefore,the Sun appears reddish at the time of sunrise and sunset.
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If the scattering intensity of a liquid is $8 \text{ units}$ at a wavelength of $500 \text{ nm}$, then the scattering intensity at a wavelength of $400 \text{ nm}$ will be approximately: (in $\text{ units}$)
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To an observer on the earth,the stars appear to twinkle. This can be ascribed to
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View SolutionAssertion : The blue colour of the sky appears due to the scattering of blue light.
Reason : Blue light has the shortest wavelength in the visible spectrum.
Reason : Blue light has the shortest wavelength in the visible spectrum.
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