In the question number 20, the electromagnetic waves

Options

A. will have same frequency
B. will have a wavelength of 0.3 m
C. fall in the region of radiowaves
D. all of these

Answer

D

Explanation

Here `upsilon=10^(9)` Hz, `lambda=(c)/(upsilon)=(3xx10^(8))/(10^(9))=0.3m`
This wavelength radiation of frequency radiation `10^(9)` Hz falls in the region of ratio waves. Hence all options are correct.