Online GK Series

This site is dedicated to the aspirants of competitive exams SSC, UPSC, Railways, Postal Assistants, Bank, GATE and NET

Q.

Because of _______ red light is used for signals ?

A High frequency
B High intensity
C Long wavelength
D High refraction
Answer & Explanation
Option: [C]
buy ebooks

Your Valuable Comments Please...

Please Like Us
Brand
100% payment protection

Recommended Books for Competitive Exams

VIEW ALL