How will you manage to get more orders of spectrum using diffraction grating?

To obtain more orders of spectrum using diffraction grating, one can increase the angle of incidence, as higher angles can lead to more visible diffraction orders. Additionally, using a grating with a higher number of lines per millimeter will enhance the separation of the orders, making them easier to observe. Adjusting the wavelength of the light source to match the grating's design for optimal diffraction can also help in achieving more distinct orders. Finally, ensuring that the light source is sufficiently collimated will improve the clarity and visibility of the higher orders.