Answer:
303.03 nm
ultraviolet region
Explanation:
f = frequency of the EM wave = 9.90 x 10¹⁴ Hz
λ = wavelength of the EM wave = ?
v = speed of EM wave = 3 x 10⁸ m/s
Using the equation
v = f λ
Inserting the values
3 x 10⁸ = (9.90 x 10¹⁴) λ
λ = 303.03 x 10⁻⁹ m
λ = 303.03 nm
The wavelength of the ultraviolet rays lies between 10-400 nm. hence the EM wave belongs to ultraviolet region
