Cathode ray that was the man we discoverd it hope tis helped
Green has a shorter wavelength.
It is very easy..let me tell you.. there are seven colors in the rainbow. Isn't it?
According to their decreasing order of wavelength , they are:
Red
Orange
Yellow
Green
Blue
Indigo
Violet.
It is as simple as that to remember....
<span>Answer:
NASA in US using its super powerful telescope checks all the meteorites ,asteroids that may land on Earth. It deflects the asteroids ,meteorites from their respective path using copper ball . But it is not wholly practical as sometimes these meteorites get enter into key hole .</span>