Name one phenomenon that demonstrates that light behaves as wave?

Question: Name one phenomenon that demonstrates that light behaves as wave?

One phenomenon that demonstrates that light behaves as a wave is interference. Interference occurs when two or more light waves overlap and interact with each other. This phenomenon can be observed through the interference patterns produced when light passes through narrow slits or falls on a diffraction grating.

When coherent light, such as that from a laser, passes through a double slit or a diffraction grating, it spreads out and creates a pattern of alternating bright and dark regions on a screen placed behind it. This pattern is known as an interference pattern. The bright regions, called constructive interference, occur when the peaks of two overlapping waves align and amplify each other, resulting in brighter light. The dark regions, called destructive interference, occur when the peaks of one wave align with the troughs of another wave, canceling out each other and producing darkness.

Interference patterns can only be explained by considering light as a wave. The patterns arise from the constructive and destructive interference of the light waves as they interact with each other. This phenomenon is consistent with the wave nature of light, where light waves can add up or cancel each other out, depending on their relative phase.

This wave behavior of light can be observed not only with visible light but also with other forms of electromagnetic radiation, such as radio waves, microwaves, and X-rays. The interference phenomenon provides strong evidence supporting the wave nature of light.

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