In a thin film interference, if the film is viewed in white light, which color w

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Question: In a thin film interference, if the film is viewed in white light, which color will appear at the center of the pattern?

Options:

Correct Answer: Red

Solution:

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

In a thin film interference, if the film is viewed in white light, which color will appear at the center of the pattern?

In a thin film interference, if the film is viewed in white light, which color will appear at the center of the pattern?

Step 1: Understand that thin film interference occurs when light reflects off the top and bottom surfaces of a thin film.
Step 2: Know that different colors of light have different wavelengths. Red light has the longest wavelength among visible colors.
Step 3: When white light passes through the thin film, it creates an interference pattern with various colors.
Step 4: The center of the interference pattern typically shows the color with the longest wavelength, which is red.
Step 5: Therefore, in a thin film viewed in white light, red light will appear at the center of the pattern.

Thin Film Interference – A phenomenon that occurs when light waves reflect off the two surfaces of a thin film, leading to constructive and destructive interference, which produces colorful patterns.
Wavelength and Color – Different colors of light correspond to different wavelengths, with red light having the longest wavelength in the visible spectrum.