In a Grating Experiment,light of 600 Nm Wavelength Produces a First-Order

Short Answer

In a grating experiment,light of 600 nm wavelength produces a first-order maximum 0.35 mm from the central maximum on a distant screen.On the same screen,a second monochromatic source produces a third-order maximum 0.87 mm from the central maximum when it passes through the same diffraction grating.What is the wavelength of the light from the second source?