Answer: A
Step-by-step explanation:
Given that the diffraction grating has 2500 slits/cm
And the wavelength of light = 500nm
The wavelength of light has no effect on the calculation of the split spacing in this question. So,
The slit spacing will be :
Slit in m ÷ number of slits
Slit spacing = 0.01/2500
Slit spacing = 4 × 10^-6 m
Therefore, option A is the correct answer.