Q3:

The diagram shows the wave fronts of two waves that have been diffracted through equally narrow gaps.
Both waves have the same speed, wavelength, frequency, and initial displacement as each other.

How many wavelengths of this light is the left-hand gap from point 𝐴 ?

How many wavelengths of this light is the right-hand gap from point 𝐴 ?

Is the interference between the two light waves at point 𝐴 constructive or destructive?

How many wavelengths of this light is the left-hand gap from point 𝐵 ?

How many wavelengths of this light is the right-hand gap from point 𝐵 ?

Is the interference between the two light waves at point
𝐵 constructive or destructive?

How many wavelengths of this light is the left-hand gap from point 𝐶 ?

How many wavelengths of this light is the right-hand gap from point 𝐶 ?

Is the interference between the two light waves at point
𝐶 constructive or destructive?

How many wavelengths of this light is the left-hand gap from point 𝐷 ?

How many wavelengths of this light is the right-hand gap from point 𝐷 ?

Is the interference between the two light waves at point
𝐷 constructive or destructive?