Question

In Young’s double slit experimental setup, if the wavelength alone is doubled, the bandwidth \( \beta \) becomes:

• A. \( \frac{\beta}{2} \)
• B. 2\( \beta \)
• C. 3\( \beta \)
• D. \( \beta \)

Hint:

In Young's double slit experiment, the fringe width is directly proportional to the wavelength of light used.

Answer 1

The Correct Option is B

The fringe width \( \beta \) in Young’s double slit experiment is directly proportional to the wavelength \( \lambda \). If \( \lambda \) is doubled, the fringe width \( \beta \) also doubles.
Final Answer: \[ \boxed{2\beta} \]