# Diffraction of Light (Single Slit)

• hairey94
In summary, diffraction of light is the bending or spreading of light waves as they pass through a narrow opening or around an obstacle. This phenomenon is caused by the interference of light waves with each other, resulting in a pattern of light and dark fringes. A single slit diffraction is a type of diffraction that occurs when light passes through a narrow single opening or slit, creating a diffraction pattern with a central bright spot and alternating bright and dark fringes on either side. The diffraction of light through a single slit is affected by the width of the slit, the wavelength of light, the distance between the slit and the screen, and the diffraction angle. The width of the slit and the diffraction pattern are inversely proportional
hairey94
Homework Statement
What is the order for second bright fringe?
Relevant Equations
The second bright fringe from a 633𝑛𝑚 light source overlaps with the third dark fringe from an unknown light source. Calculate the wavelength of the unknown light source.
My initial guess... Third dark fringe is 2nd order dark fringe and second bright fringe is 1st order bright fringe. Is this the correct guess?

HI,

You are not supposed to guess ! Draw a diffraction pattern (or find one) and use the given info to calculate.

## What is diffraction of light?

Diffraction of light is the phenomenon where light waves spread out as they pass through a narrow opening or around an obstacle. This results in a pattern of bright and dark fringes that can be observed on a screen or surface.

## What is a single slit?

A single slit is a narrow opening through which light can pass. It is often used in experiments to demonstrate the diffraction of light.

## How does the width of the slit affect the diffraction pattern?

The width of the slit directly affects the diffraction pattern. As the width of the slit decreases, the diffraction pattern becomes wider and the fringes become more spread out. Conversely, as the width of the slit increases, the diffraction pattern becomes narrower and the fringes become closer together.

## What is the relationship between the wavelength of light and the diffraction pattern?

The wavelength of light and the diffraction pattern are inversely proportional. This means that as the wavelength of light increases, the diffraction pattern becomes narrower and the fringes become closer together. As the wavelength decreases, the diffraction pattern becomes wider and the fringes become more spread out.

## What is the difference between diffraction and refraction?

Diffraction and refraction are both phenomena that involve the bending of light. However, diffraction occurs when light waves pass through a narrow opening or around an obstacle, while refraction occurs when light travels through a medium with varying densities. Additionally, diffraction results in a pattern of fringes, while refraction causes a change in the direction of light.

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