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प्रश्न
The danger signal is red. Why?
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उत्तर
Since the wavelength of red light is the longest in the visible light, the light of red colour is scattered the least by the air molecules of the atmosphere and therefore the light of red colour can penetrate to a longer distance. Thus red light can be seen from the farthest distance as compared to other colours of same intensity. Hence it is used for danger signal so that the signal may be visible from the far distance.
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संबंधित प्रश्न
Which color of white light is scattered the least and why?
Name a natural phenomenon which is caused by the dispersion of sunlight in the sky.
What colours lie on the two sides of the 'green colour' in the spectrum of white light?
How many colours are there in a full spectrum of white light? Write the various colours of spectrum in the order, starting with red.
What is the colour of the sunlight:
scattered by the dust particles in the atmosphere?
Why does the sun appear red at sunset?
The clouds are seen white. Explain
In white light of sun, maximum scattering by the air molecular present in the earth’s atmosphere is for ______.
What is meant by advance sunrise and delayed sunset? Draw a labelled diagram to explain these phenomena.
Which of the following phenomena contributes significantly to the reddish appearance of the sun at sunrise or sunset?
