NextMockSearch exams, e.g. SSC CGL, UPPSC, Lekhpal
Railways PYQCBT 1 2016

RRB NTPC · Question 24

Which of the following coloured light has the lowest Frequency?

  1. Green

  2. Blue

  3. Red

  4. Violet

Show answer & explanation

Answer: (C) Red

Explanation

In the visible spectrum (VIBGYOR), frequency increases from red to violet. Red light has the longest wavelength and therefore the lowest frequency, while violet has the highest frequency.