A person got his eyes tested by an optician. The prescription for the spectacle lenses to be made reads : Left eye : + 2.50 D Right eye : + 2.00 D (a) State whether these lenses are thicker in the middle or at the edges. (b) Which lens bends the light rays more strongly ? (c) State whether these spectacle lenses will converge light rays or diverge light rays.
In your provided video of Light and Reflection it is said that light remains undeviated after refraction through a glass slab. But in chapter of human eye it is said while refration through a triangular prism the light ray has angle of deviation and the Two rays intersect if extended. And why in diagrams it is shown that light rays bends away or towards in the left of normal, Why not to the right of the normal.