Question
Physics Question on Ray optics and optical instruments
Which colour of the light has the longest wavelength?
A
green
B
violet
C
red
D
blue
Answer
red
Explanation
Solution
Red has the longest wavelengthamong the given options. Red has the longest and violet has the shortest wavelength, this can be determined from the acronym VIBGYOR.
For frequency, it is inverse.
Therefore, option C) Red is the correct choice.