Answer:
2.143 × 10^-2m
Step-by-step explanation:
The wavelength, denoted by λ, can be determined using the formula;
λ = v/f
Where; λ = wavelength (m)
v = speed of light (3 × 10^8m/s)
f = frequency
According to the provided information, f = 1.4 x 10^10Hz, v = 3 × 10^8m/s
Hence, λ = v/f
λ = 3 × 10^8/ 1.4 x 10^10
λ = 2.1428 × 10^(8-10)
λ = 2.143 × 10^-2m