Solving Diffraction Grating Angle: Can it be 90°?

[tenzinlhazey]

You know when you have diffraction gratings, you have to measure the angle between center and first order/maxima right? My question is: can the angle be 90°? Or is it always less than that?
d sin θ = nλ

Thank you!

 

[kuruman]

Hi tenzinlhazey and welcome to PF



According to the equation, the angle can be 90^o. If that were the case, where would the maximum appear?

 

[tenzinlhazey]

Hi tenzinlhazey and welcome to PF



According to the equation, the angle can be 90^o. If that were the case, where would the maximum appear?

Aww thank you :) yes, I m not sure where would the maximum appear. :/