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Multiple Choice Questions
1. Why does a piece of cloth, which appears green in sunlight, appear black when it is viewed under red light?
(A): The cloth completely absorbs red colour wavelength.
(B): It is due to refraction.
(C): It is the effect of scattering of light.
(D): It is due to parallax error.
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RRB NTPC 31 March 2016 Shift 2
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