Question

In Y.D.S.E, when a glass plate $(\mu =1.5)$ of thickness $t$ in introduced in the path of one of the interfering beams (wavelength $\lambda$ ). The intensity at the position where the central maxima occurred previously remains unchanged. The minimum thickness of the glass plate is.

• A. $2\lambda$
• B. $2N/3$
• C. $\lambda /3$
• D. $\lambda$

Answer 1

Answer: (A)

Correct answer is (a) $2\lambda$