Question

In Young's double slit experiment if the maximum intensity of light is $I_{max}$, then the intensity at path difference $\frac{\lambda }{2}$ will be

• A. $I_{max}$
• B. $\frac{I_{max}}{2}$
• C. $\frac{I_{max}}{4}$
• D. zero

Answer 1

The correct option is D zero

Destructive interference occurs when the difference is an odd multiple of $\pi$ ,

for path difference of $\lambda /2$ , $\varphi =\pi$