# A diffraction grating is illuminated using a lamp that has red (656 nm) and violet (434 nm) lines...

## Question:

A diffraction grating is illuminated using a lamp that has red (656 nm) and violet (434 nm) lines in its spectrum. The grating has 4000 lines/cm. A screen is placed at a distance of 12.0 m from the grating.

(a) In how many orders do you expect to see both red and violet lines?

(b) Find the distance on the screen between the third order red and the fifth order violet.

## Diffraction Grating:

A diffraction grating is made of multiple narrowly spaced slits that split light into its component wavelengths. The diffraction pattern produced is composed of bright and dark fringes that can be seen on the screen.

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(a) In how many orders do you expect to see both red and violet lines?

From the equation that describes the diffraction condition, we take:

{eq}d\...

Multiple-slit Diffraction: Interference Pattern & Equations

from

Chapter 15 / Lesson 11
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A diffraction grating is a grid of slits scratched into glass in a crisscross pattern and has many different uses, from medical imaging to genetic research and fiber optics. Learn more about different uses of diffraction gratings and how to use the equation for calculating the maxima through real-world examples.