JEE Main 2025 Physics question

Young's double slit interference apparatus is immersed in a liquid of refractive index 1.44. It has slit separation of 1.5mm. The slits are illuminated by a parallel beam of light whose wavelength in air is 690 nm. The fringe-width on a screen placed behind the plane of slits at a distance of 0.72m, will be :

• (1)0.23 mmCorrect
• (2)0.33 mm
• (3)0.63 mm
• (4)0.46 mm