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You send a laser beam with a wavelength of 190 nm through a grating with a...

You send a laser beam with a wavelength of 190 nm through a grating with a uniform slit separation of 455 nm. In the resulting interference pattern on a large distant screen, what are the angular locations θ of all of the bright spots in the interference pattern?

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Answer #1

Wavelength (λ) = 190 nm

Separation of slits (d) = 455 nm

For condition of maximum on screen -

​​​​​​​​​​​

   nx190/455

When n = 1

0.41

  24.68 degree

And

   - 24.68 degree

When n = 2

Sin = 2x0.41 = 0.835

= 56.63 degree

And ​​​​​​​ = - 56.63 degree

​​​​

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