Coherent waves with an optical path difference ∆l = 2.7 microns arrive at a certain point in space.

Coherent waves with an optical path difference ∆l = 2.7 microns arrive at a certain point in space. Determine whether the light will increase or decrease at this point if the wavelength is λ = 450 nm.

To calculate the change in light at a specified point in space, we apply the formula: k = Δl / λ.

Variables: Δl – optical path difference of the given coherent waves (Δl = 2.7 μm = 2.7 * 10-6 m); λ – the length of the specified waves (λ = 450 nm = 45 * 10-8 m).

Let’s make a calculation: k = Δl / λ = 2.7 * 10-6 / (45 * 10-8) = 6 (is an integer).

Answer: Amplification of light.