Refraction bends the light downward upon entering the glass because the bottom part of the ray hits the slow medium first.
Light travels more slowly in glass than in air. The amount of bending depends upon the index of refraction of the glass.
Image formation depends upon bending light rays with lenses.
Refraction bends the light downward again upon leaving the glass because the top part of the ray hits the faster medium first.
Light travels more slowly in glass than in air. The amount of bending depends upon the index of refraction of the glass.
Image formation depends upon bending light rays with lenses.
Refraction bends the light downward again upon leaving the glass because the top part of the ray hits the faster medium first.