Destructive interference occurs when 2t = (m + 1/2)λ, where m is an integer.

Red light has the longest wavelength and will appear at the center of the interference pattern.

The colors in soap bubbles are due to thin film interference caused by the reflection and refraction of light at the film's surfaces.

When light reflects off a medium with a higher refractive index, a phase change of π occurs, leading to destructive interference.

A dark fringe occurs when the path difference is an odd multiple of the wavelength (λ/2), leading to destructive interference.

Destructive interference in thin films occurs when the effective path difference is an odd multiple of half the wavelength, given by 2t = (m + 1/2)λ.

For constructive interference in a thin film with a denser medium below, the condition is 2t = mλ.

Wavelength in the film λ' = λ/n. If λ = 900 nm, then λ' = 900 nm / 1.5 = 600 nm.

For constructive interference in a thin film, the condition is 2t = mλ, where m is an integer.

For destructive interference in a thin film, the condition is 2t = (m + 1/2)λ, where m is an integer.

For destructive interference in a thin film, the condition is 2t = (m + 1/2)λ, where m is an integer.

Wavelength in oil = λ/n, where n is the refractive index of oil. Assuming n = 1.5, λ_oil = 600 nm / 1.5 = 400 nm.

Destructive interference for blue light means blue light is canceled out, allowing longer wavelengths (like red) to be seen.

Constructive interference for blue light indicates that blue will be the color seen due to the film thickness.

The color seen depends on the thickness of the film and the wavelength of light. Typically, red is seen due to constructive interference for certain thicknesses.

The color that is most prominently reflected depends on the thickness of the film and the wavelength of light. Typically, shorter wavelengths (like blue) are more affected by thin films.

At the center of the film with thickness λ/2, destructive interference occurs for all wavelengths, leading to no color.

At the center, where the path difference is λ, constructive interference occurs, and the color that appears depends on the wavelength of light, typically red for thin films.

The color that appears depends on the thickness of the film and the wavelength of light. Blue light has a shorter wavelength and will be more prominently reflected.

If the film thickness causes constructive interference for blue light, blue will be the color that appears most prominently.

If the film thickness causes constructive interference for blue light, blue will be the color that appears at the topmost layer.

The color that appears depends on the thickness of the film and the wavelength of light. Typically, red light is least affected by thin film interference.

If destructive interference occurs for blue light, the complementary color (red) will appear bright.

Constructive interference in thin films often enhances the green color due to the specific thickness of the film and the wavelength of light.

The color that is most prominently visible depends on the thickness of the film and the wavelength of light. Typically, shorter wavelengths like blue are enhanced due to constructive interference.

The colorful patterns in a thin film are due to interference of light waves reflected from the top and bottom surfaces of the film.

Effective wavelength in the film = λ/n = 500 nm / 1.33 ≈ 375 nm.

Different colors are seen due to interference of light waves reflected from different thicknesses of the soap film, which changes with angle.

Different colors are seen because different wavelengths of light interfere constructively at different angles due to the varying thickness of the soap film.

Magnification (m) is given by m = -v/u. Here, m = -10/15 = -2/3, which means the magnification is 1.5 in absolute value.