The discussion revolves around a diffraction grating problem involving the calculation of the angle at which red light of wavelength 635 nm appears in first order, given a grating with 2469 lines/cm.
Some participants have provided clarifications regarding the calculation of 'd' and its significance in the formula. There is an acknowledgment of potential confusion in the setup of the problem, particularly concerning the units involved.
Participants note the importance of correctly identifying the distance between grating lines based on the number of lines per centimeter, which is crucial for applying the formula accurately.
Kris1120 said:Homework Statement
White light is spread out into its spectral
components by a diffraction grating.
If the grating has 2469 lines/cm, at what
angle does red light of wavelength 635 nm
appear in first order?
Answer in units of ◦.
Homework Equations
sin(theta) = m(\lambda /d)
The Attempt at a Solution
theta = inverse sin [( 1 * 635 e-9 m) / 24.69 m} = 1.4735 e -6 degrees
Kris1120 said:I see... its 1 / 2469 cm! Thank you!