Question
Physics Question on Ray optics and optical instruments
Danger signals are made of red colour. Velocity of red light is maximum and thus more visibility in dark.
A
Both Assertion and Reason are true and Reason is the correct explanation of Assertion
B
Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
C
Assertion is true but Reason is false
D
Assertion is false but Reason is true
Answer
Both Assertion and Reason are true and Reason is the correct explanation of Assertion
Explanation
Solution
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.