This is why the experimental demonstration of electromagnetic
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wave had to come in the low frequency region (the radio
wave region), as in the Hertz’s experiment (1887) Hertz’s successful experimental test of Maxwell’s
theory created a sensation and sparked off other
important works in this field Two important
achievements in this connection deserve mention Seven
years after Hertz, Jagdish Chandra Bose, working at
Calcutta (now Kolkata), succeeded in producing and
observing electromagnetic waves of much shorter
wavelength (25 mm to 5 mm)