Physics basics | frequency

wave = energy
wave completes a cycle= a positive half and negative half, like like wave in water, when you blow it.

frequency of a wave = number of completed cycle / any time interval = that many Herts

2 cycle / sec = 2 Hertz frequency.

SPECTRUM (RANGE)

 

 

The range of frequency for a given type of waves, sound waves, electrical waves, electro-mangnet waves.

 

The range is defined by the starting and end frequency also refered as bandwidth(0-50 herts = BandC)

 

WAVELENGTH

 

The distance between two similar point of a given waves

 

because signal strength can not only be defined by frequency, ie. how many wave cycle per sec , it also depends , how big the wave is (Wavelength)

 

Lamda = C/ F , where c = speed of light 8

 

 

 

FM Radio frequency,

ranges from 87 Mhz to 104 Mhz, i,e, the that many cycles per second,

you if you want to catch a specific f wave you need tune your receiver to that level, so that you catch that wave only.

 

 

Old TV antenna,

 

They had different length of roads, each was catching different f , so max 12 roads means, only 12 channels