Find the wavelength, in angstrom unit, of electromagnetic waves of frequency `5 xx 10^19` Hz in free space.

Find the wavelength of electromagnetic waves of frequency 5× 10^19 Hz in free space.

Find the wavelength of electromagnetic waves of frequency 9× 10^19 Hz in free space.

Find the wavelength of electromagnetic waves of frequency 4× 10^19 Hz in free space.

Find the wavelength of electromagnetic waves of frequency 7× 10^19 Hz in free space.

Find the wavelength of electromagnetic waves of frequency 8× 10^19 Hz in free space.

Find the wavelength of electromagnetic waves of frequency 3xx10^(12) Hz in free space

Find the wavelength of electromagnetic waves of frequency 5xx10^(19) Hz in free space. Where is this type of wave used ?

Find the wavelength of electromagnetic waves of frequency 5xx 10^(19) Hz in free space. Give its two applications.