A diffraction grating is used to measure the wavelength of light.
The spacing of the slits in the grating is $1.15 ×10^{–6}m$. The angle between the first-order diffraction maxima is $60.0^\circ $, as shown.
What is the wavelength of the light?
1 )
$288 nm$
2 )
$498 nm$
$575 nm$
4 )
$996 nm$
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