why cant we see mobile and Wifi signals which is always present around us..read below to find out Answer.

Hello, all welcome to the new concept "why can't we see mobile and wifi signals which are present always around us." first of all thank you all for reading this topic and spending your precious time here. Ok coming back to this concept I can clearly explain u this. First of all, we must know what an electromagnetic spectrum is.
So, first coming to wave.

A wave is a disturbance that transfers energy through matter or space, with little or no associated mass transport.

waves definition

Electromagnetic waves

 Electromagnetic waves are created by the vibration of an electric charge. This vibration creates a wave which has both an electric and a magnetic component.

electric and magnetic direction of waves

Definition Of Wavelength

The distance between two peaks of a wave. Wavelengths can be measured on anything that travels in waves, like sound, light, or water.

Definition Of Frequency

Frequency, in physics, the number of waves that pass a fixed point in unit time; also, the number of cycles or vibrations undergone during one unit of time by a body in periodic motion

So coming to ELECTROMAGNETIC SPECTRUM   it is arrangement of electromagnetic waves according frequency and wavelength.

electromagnetic spectrum with frequency description above

Visible spectrum and non visible spectrum

The human eye can only see visible light, but light comes in many other "colors" - radio, infrared, ultraviolet, X-ray, and gamma-ray - that are invisible to the naked eye. On one end of the spectrum there is infrared light , which, while too red for humans to see, is all around us and even emitted from our bodies.

clear explanation of types of waves from above figure

·       Radio wave. Wave from the portion of the electromagnetic spectrum at lower frequencies than microwaves. The wavelengths of radio waves range from thousands of metres to 30 cm. These correspond to frequencies as low as 3 Hz and as high as 1 gigahertz (10⁹ Hz).

·       Mobile and Wifi operate at Radio waves.

·       Mobiles and wifi signals are carried through radio waves at speed of light.

Keypoints

·       Longer wavelength  lower frequency like radio waves doesnot effect human

·       Shorter wavelength higher frequency like x rays gamma rays UV rays effect human.

Wavelength and frequency are inversely proportional

From all above we can conclude

1.    Mobile and Wifi has lower frequency  and higher wavelength.it can travel longer distance

2.    Since it is Present in non visible light spectrum.

We cannot see mobile and wifi signal with our naked eyes

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