GENERAL KNOWLEDGE

Detailed explanation-1: -Waves in the electromagnetic spectrum vary in size from very long radio waves the size of buildings, to very short gamma-rays smaller than the size of the nucleus of an atom. Yet their size can be related to their energy. The smaller the wavelength the higher the energy.

Detailed explanation-2: -Electromagnetic waves are categorized according to their frequency f or, equivalently, according to their wavelength = c/f. Visible light has a wavelength range from  400 nm to  700 nm. Violet light has a wavelength of  400 nm, and a frequency of  7.5*1014 Hz.

Detailed explanation-3: -The energy associated with EM radiation is proportional to frequency and inversely proportional to wavelength. Thus, EM waves with shorter wavelengths have more energy. Examples of EM radiation (from lowest to highest energy) include radio waves, microwaves, infrared, visible light, UV, and radiographs (Fig. 3.1).

Detailed explanation-4: -Thus we see that visible light and gamma rays and microwaves are really the same things. They are all electromagnetic radiation; they just differ in their wavelengths.