# Why longer wave diffracts more?

• kelvin490
In summary, waves with longer wavelengths diffract more than shorter waves when passing through an aperture of the same size. This is due to the interference pattern created by the sum of all waves from imaginary point sources on the wavefront incident on the aperture. This phenomenon can be further understood by exploring the relationship between wavelength, aperture size, path difference, and order of interference. Additional information can be found by researching online.
kelvin490
Gold Member
We have learned that for the same aperture, waves with longer wavelength diffract more than shorter waves when passing through the aperture. I would like to ask is this merely an experimental fact? Are there more fundamental principles behind this phenomenon?

The diffraction pattern is in fact an interference pattern and can be found by summing the contributions of the waves from all of the imaginary point sources on the wavefront incident on the aperture.If the wavelength is made longer(or the aperture smaller)then for a given path difference and order of interference, the waves diffract through a greater angle.Try googling for details.

## 1. What is diffraction?

Diffraction is a phenomenon that occurs when a wave encounters an obstacle or passes through an opening and bends around it, spreading out in different directions.

## 2. Why does longer wave diffract more?

Longer waves diffract more because they have a longer wavelength, which means they have a larger distance between each wave crest. This allows them to bend around obstacles more easily compared to shorter waves with a smaller wavelength.

## 3. How does the size of the obstacle affect diffraction?

The size of the obstacle does not affect diffraction, but rather the size of the opening or obstacle relative to the wavelength of the wave. If the opening or obstacle is similar in size to the wavelength, diffraction will be more significant.

## 4. Can diffraction occur with any type of wave?

Yes, diffraction can occur with any type of wave, including electromagnetic waves (such as light and radio waves), sound waves, and water waves.

## 5. What are some real-life examples of diffraction?

Some real-life examples of diffraction include the bending of light around a corner, the spread of sound from a speaker, and the ripples in water caused by a rock being thrown into a pond.

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