Question
Red light is used for signals because it has
–Solution
Red is the international colour of stop signs and stop lights on highways and intersections because it is scattered the least by air molecules. The effect of scattering is inversely related to the fourth power of the wavelength of a colour. Red has the highest wavelength of all the colours and is able to travel the longest distance through fog, rain, and the alike.
Which statement is incorrect regarding the atmospheric layers and their characteristics?
How does a bulb glow when the switch is turned on?
Who is elected as the new President of the country South Korea?
Which gas is commonly used for the artificial ripening of fruits?
Ebola disease is caused by which of the following?
Who discovered the virus?
Who discovered Penicillin?
A satellite is used for
What is the other name for conventional source of energy?
Which instrument is commonly used to measure the depth of water bodies?
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