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Homework Statement
A bulb emits a continuous spectrum of ultraviolet, visible and infrared light in the wavelength range 360nm to 2000nm. Assume that the light from this bulb is incident on a diffraction grating with slit spacing d and that the first-order brightness maximum for the wavelength of 1200 nm occurs at angle (theta). What other wavelengths within the spectrum of incident light will produce a brightness maximum at this same angle (theta)?
Homework Equations
sin(theta) = m(lamda)/d
where m is an integer representing the order, and d is the distance between grating lines. Lamda represents the wavelengths of the light.
The Attempt at a Solution
Since I am given a lamda (wavelength) and an order, I set up my equation for theta as
(theta) = arcsin (1200nm/d)
I have no idea what the problem is asking for.
Please give me some hints.
Thanks