Write short nots on (c ) radio waves

Explanation

It is produced by oscillators in electric circuits. The wavelength range is `1 xx 10^(-1)" m to " 1 xx 10^(4) `m and frequency range is `3 xx 10^(9)" Hz to" 3 xx 10^(4)` Hz. If obeys reflection and diffraction. It is used in radio and television communication systems and also in cellular phones to transmit voice communication in the ultra high frequency band.