Question 1 (5 points)

The value of d drepresents the spacing between the grooves in the diffraction grating. You were asked to calculate this value from the sodium chloride spectrum.

Enter your value for d (in nanometres) using 3 significant figures in the answer box provided.

Do not include the units with your answer-only the numerical value - else your answer will be marked wrong.

To enter your answer in scientific notation, use 2.51e-3 for 0.00251 or 2.52e3 for 2520.