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Physics
Assertion: Danger signals are made of red colour. Reason: Velocity of red light is maximum and thus more visibility in dark.
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Q.
Assertion:
Danger signals are made of red colour.
Reason:
Velocity of red light is maximum and thus more visibility in dark.
AIIMS
AIIMS 2000
Ray Optics and Optical Instruments
A
Both Assertion and Reason are true and Reason is the correct explanation of Assertion
56%
B
Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
17%
C
Assertion is true but Reason is false
20%
D
Assertion is false but Reason is true
7%
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.