Answer:
The distance from the central bright spot is 13.73 mm.
Step-by-step explanation:
Given that,
Wavelength = 520 nm
Width d= 17 mm
Distance L= 1.6 m
Order = 3
We need to calculate the distance from the central bright spot
Using formula of distance

Put the value into the formula


Now, the wavelength is changed to 630 nm
We need to calculate the distance from the central bright spot with the second order of this light



Hence, The distance from the central bright spot is 13.73 mm.