According to the diffraction principle, as the slit width decreases, the width of the central maximum increases.

The angle of the first minimum in single-slit diffraction is given by sin(θ) = λ/a, where a is the width of the slit.

The angle for the first minimum in single-slit diffraction is given by a sin θ = λ, hence θ = λ/a.

The angular separation (θ) is directly proportional to the wavelength (λ). Therefore, increasing λ increases the angular separation.

Fringe separation is directly proportional to the wavelength. If the wavelength increases, the fringe separation also increases.

The position of the first minimum in single-slit diffraction is given by a sin(θ) = λ. Increasing λ will cause θ to increase, moving the minimum away from the center.

The central maximum has the maximum intensity because all light waves arrive in phase at this point, leading to constructive interference.

Fringe width (β) is given by β = λD/d. If λ is halved, β will also be halved.

When light reflects off a denser medium, a phase change of π occurs, leading to destructive interference for certain path differences.

If destructive interference occurs for blue light, the color seen will be the complementary color, which is red.

At the center of the thin film interference pattern, the color that appears is typically green due to the constructive interference of wavelengths in that range.

Fringe separation is directly proportional to the distance from the slits to the screen. Increasing this distance increases the fringe separation.

The angle of diffraction is directly proportional to the wavelength of light used in a diffraction grating, as described by the grating equation.