Photoelectric Effect and Colours

Topic Content:

The colours of the visible spectrum, from highest to lowest are:

• Violet
• Indigo
• Blue
• Green
• Yellow
• Orange
• Red

This means that violet has the highest frequency and red has the lowest frequency. The frequency decreases as you move from violet to red and the wavelength increases, because higher frequencies correspond to shorter wavelengths.

Different colours of light correspond to different energyEnergy is the ability to do work. Energy exists in several forms such as heat, kinetic or mechanical energy, light, potential energy, and electrical energy. Units of Energy: The SI unit... More levels in the photoelectric effect, with higher frequency colours like violet and indigo