<span>The visible light has wavelength in the range 400 - 700 nano-meters. The wavelengths longer than visible light are: 1-Infrared waves (used in ringtone/mobile waves)2-microwaves - used to heat and cook food. 3- Radio waves - used in communication purposes.</span>
Ciner forms when there is a series of violent and gentle eruptions resulting in layering of lava and ash
An electron is emitted in both positive and negative beta decay, although the positive one is called positron emission.
