Question

When a single slit is replaced by a double-slit arrangement, the intensity of the central maximum is increased by:

• A. 2 times
• B. 4 times
• C. 8 times
• D. 16 times

Hint:

When moving from **single slit** to **double slit**, the intensity of the **central maximum increases by a factor of 4**.

Answer 1

The Correct Option is B

In a double-slit experiment, the intensity is given by:
\[ I = 4 I_0 \cos^2(\delta/2) \] where:
- \( I_0 \) is the intensity from each slit.
At the central maximum, constructive interference occurs, and the intensity increases by a factor of 4.