A wave has an energy of 6.63 x 10-18J. What form of electromagnetic radiation is this?

Answer 1

Energy=6.63*10^-18 J

Planks constant (h)=6.63*10^-34J/s

c=3*10^8 m/s

E=(h*c)/wavelength

wavelength=(h*c)/E

=> Wavelength = {(6.6310^-34 )(310^8)}/6.6310^-18

=> Wavelength = 3*10^-8 m or 30 nm

So wavelength of 30 nm means it lies in Ultraviolet radiation region as it covers region from wavelength of 100 nm to 1nm of electromagnetic radiations.