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Q.

Choose the incorrect statement.

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a

In Rayleigh scattering, amount of scattering is inversely proportional to fourth power of wavelength

b

Secondary rainbow is fainter than primary rainbow

c

If size of particle is larger than wavelength, then red colour light scatters most

d

In reflecting telescope, parabolic mirror can be used as an objective to remove the spherical aberration.

answer is C.

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Detailed Solution

If the size of particles is larger than the wavelength of light, Mie scattering is more relevant, and the scattering behavior doesn't favor one color over another as strongly as Rayleigh scattering does. This is why we often don't see a dominant color associated with scattering in environments where Mie scattering is prevalent, like in conditions with larger particles such as water droplets or dust.

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