Question

How does the width of the slits affect the intensity in YDSE.

Answer 1

Explanation:

1. The intensity of the light ray is directly proportional to the slit width. Therefore the widths of the slits are greater than the wavelength of the light, the light casts a shadow.
2. When the widths of the slits are narrow, light undergoes diffraction and the light waves overlap on the screen.
3. Mathematically $$\begin{gathered} \mathrm{I}\propto {\mathrm{A}}^2\propto \mathrm{W} \\ \mathrm{Where}\mathrm{I}\mathrm{is}\mathrm{intensity}\mathrm{A}\mathrm{is}\mathrm{amplitude},\mathrm{W}\mathrm{is}\mathrm{width}\mathrm{of}\mathrm{slit} \end{gathered}$$
4. Hence, the intensity of the light is more as the width of the slit increases.

Hence, as the slit's width rises, the light's intensity grows.