Light is incident normally on a diffraction grating having 6000 lines/cm. Second order line is observed at an angle of 30°. What is the wavelength of light?
1
4160 Å
2
4800 Å
3
5000 Å
4
None
Light is incident normally on a diffraction grating having 6000 lines/cm. Second order line is observed at an angle of 30°. What is the wavelength of light?
4160 Å