The figure above represents a ray of light going from air through glass into water, such as going into a fish tank. Calculate the amount the ray is displaced by the glass (labeled as x ₂ ? x ₁ in the above figure), given that the incident angle is 40.0? and the glass is 1 cm thick. Assume the refractive index of glass is 1.5.

ni n2 n3 0 02 02 X1 x10 X2 air glass d water