Question

Select One Correct Option from the following: In the ideal double-slit experiment, when a glass-plate (refractive index 1.5) of thickness t is introduced in the path of one of the interfering beams (wavelength $\lambda$), the intensity at the position where the central maximum occurred previously remains unchanged. The minimum thickness of the glass-plate is
(A) $2\lambda$
(B) $2\lambda/3$
(C) $\lambda/3$
(D) $\lambda$.

Answer 1

c option is correct I think.
mark brainliest if you like

Answer 2

Select One Correct Option from the following: In the ideal double-slit experiment, when a glass-plate (refractive index 1.5) of thickness t is introduced in the path of one of the interfering beams (wavelength $\lambda$), the intensity at the position where the central maximum occurred previously remains unchanged. The minimum thickness of the glass-plate is

(A) $2\lambda$

(B) $2\lambda/3$

✔️ (C) $\lambda/3$

(D) $\lambda$.