Find the condition for constructive d destructive interference

CBSE Class 12
1

Find the condition for constructive d destructive interference. How does the intensity depend on the width of the slit

2

Please refer to NCERT Physics XII textbook
Chapter wave optics
Page 361
Equations 10.10 and 10.11 are the conditions
the width of the slit determines the amount of the light entering through it. The boarder the opening of the slit the more light passes through it.