Light of wavelength $680\,\text{nm}$ falls normally on a diffraction grating with $450$ lines $\text{mm}^{-1}$. What angle of diffraction corresponds to the second-order maximum in the diffraction pattern produced?
- A$1.8^\circ$
- B$3.5^\circ$
- C$18^\circ$
- D$38^\circ$