At some point in space, waves come from coherent sources, the wavelength of which is λ = 500 nm

At some point in space, waves come from coherent sources, the wavelength of which is λ = 500 nm, with an optical path difference Δ = 0.5 mm. What will be observed at this point – an increase or decrease in light?

To calculate the change in light at some point in space, we use the formula: k = Δd / λ.

Variables: Δd – optical path difference of the given waves (Δd = 0.5 mm = 0.5 * 10: -3 m); λ – wavelength (λ = 500 nm = 5 * 10: -7 m).

Let’s calculate: k = Δd / λ = 0.5 * 10: -3 / (5 * 10: -7) = 1000 (integer).

Answer: Amplification of light.