Question

When a ray enters from air to glass slab

Answer 1

Answer:

Hope this will help you .

Please mark me as brainleast...

Explanation:

When a ray of light enters a glass slab from air then its speed decreases as it encounters a dense medium. Since to conserve energy (which is dependent solely on frequency), the frequency must remain constant, the wavelength of light changes. Wavelength is decreased by a factor called refractive index of the medium

Answer 2

Answer:

turns towards the normal

Explanation:

as air is a rarer medium compared to glass slab therefore when light ray enters from rarer to denser medium it turns towards the normal and it is vice versa for denser to rarer medium i.e it turns away from the normal