Daily Quiz (Science) - 18, December, 2017
Red light signal is used as a danger signal because -
Red light is scattered least
This is comfortable for eyes
It produces least chemical reaction
It is leat absorbed in air
Sky is blue because -
Blue colour in the sunlight is more than other colours
Short waves are scattered more than long waves by atmosphere
Blue colour is more absorbing to eyes
Atmosphere absorbs long wavelength more than short wavelength
Pearl is mainly constituted of -
Funk invented -
Which of the following elements is not essential for plant growth?
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