Wave Optics

In Young's double slit experiment using monochromatic light of wavelength '\(\lambda\)', the maximum intensity of light at a point on the screen is \(\mathrm{K}\) units. The intensity of light at point where the path difference is \(\frac{\lambda}{3}\) is

\(\left[\cos 60^{\circ}=\sin 30^{\circ}=\frac{1}{2}\right]\)