Question

When a ray of light passes through a rectangular glass slab:

• A. After the first refraction, it bends towards the normal and after the second refraction it bends away from the normal
• B. After the first refraction, it bends away from the normal and after the second refraction it bends towards the normal
• C. After both refractions, it bends towards the normal
• D. After both refractions, it bends away from the normal

Answer 1

The correct option is A After the first refraction, it bends towards the normal and after the second refraction it bends away from the normal

A light ray travelling obliquely from a denser medium to a rarer medium bends away from the normal. A light ray bends towards the normal when it travels obliquely from a rarer to a denser medium. Glass is denser than air,

Therefore, When a ray of light passes through a rectangular glass slab, after the first refraction, it bends towards the normal and after the second refraction, it bends away from the normal.