Question

1).Red colour is used in danger signal ?​

Answer 1

Red colour is always used for danger signals, because as red colour is having the longest wavelength, it is the least scattered. So, this signal can be seen from a very long distance.

Answer 2

Answer:

$\red{Red colour  \: is \: always \:  used  \: for \:  danger \: signals, because \: as \:  red \: colour  \: is \: having the \: longest \: wavelength, \: it \: is \: the \: least \: scattered. \: So, \: this  \: signal  \: can \: be \: seen \: from \: a \: very \: long \: distance.}$

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