The light ray passes through the prism uniformly without any change in direction.

The light ray undergoes complete reflection at both faces of the prism.

The two refracting faces of the prism are inclined to each other, causing an overall deviation of the light ray.

The parallel faces of the prism produce equal refractions that cancel each other.

To absorb water more efficiently

To neutralise excess stomach acid

To ensure the correct shape and activity of enzymes like pepsin

To prevent the growth of harmful bacteria

Chemical change is always reversible, while physical change is never reversible.

Chemical change results in a new substance, while physical change does not.

Chemical change affects only size and shape, while physical change affects composition.

Chemical change changes only appearance, while physical change forms new substances.