When the experimental set up is immerse in water of refractive index n=1.5.what will be the charge in beta?

To determine the change in beta when the experimental setup is immersed in water, we need to have some additional information about the system and the quantity being referred to as "beta." The term "beta" can have different meanings depending on the context. Could you please provide more details or clarify the question so that I can give you a more accurate response?