lines fainter in second orderand the lines are further apart :)

Prism spectrum is formed due to DISPERSION but grating spectrum is formed due to DIFFRACTION.

In prism spectrum we have only one order but in grating spectrum we can have second order too

IN prism spectrum we have continuous spectrum but in gratings we have only line spectrum

In prism spectrum red end will be closer to the direct ray but in grating spectrum violet end will be closer to the direct ray

The order of light in a spectrum is the order of the colours of the rainbow (Red, Orange, Yellow, Green, Blue, Indigo, and finally, Violet)

Electromagnetic spectrum is a diagram that show the range, or spectrum of electromagnetic waves, in order of wavelength, frequency and energy.

Lippershey first discovered a dark-line spectrum.