Final answer:
The separation between the slits in a diffraction grating with 450 slits/mm is approximately 0.0022 mm.
Step-by-step explanation:
A diffraction grating with 450 slits/mm can be used to separate light into its constituent wavelengths. To find the separation between the slits, we can use the formula:
d = 1 / n
Where d is the separation between the slits and n is the number of slits per unit length. Plugging in the values, we get:
d = 1 / 450
Therefore, the separation between the slits is approximately 0.0022 mm.